351 modified

Find FORD 5.8L/351 Ford Modified Head Gaskets and get Free Shipping on Orders Over $109 at Summit Racing! Use your Summit Racing SpeedCard today, and get up to 10% back - Get Details! ... 0.060 in. Thickness, Rubber Coated Copper, Ford, Boss, Cleveland, Modified, Pair. Part Number: FOG-905564060. 5.0 out of 5 stars. Estimated Ship Date: …

If you’re a diehard racing fan or a collector of diecast cars, then you’ve probably heard of dirt modified diecast cars. These miniature replicas of dirt modified race cars have ga... CFM Requirement = (Engine Displacement x Maximum RPM) ÷ 3,436. For example: 351 ci x 6,500 rpm ÷ 3,456 = 660 cfm. Most high-performance street Clevelands need no more than a 650-cfm 4-barrel carburetor. It is when you get into high RPM and greater displacement that you need a larger carburetor (more CFM). Performance rebuild 351/400 engines Engine is torn down and all parts are inspected for wear and damage. All parts to be reused are cleaned Block is baked, blasted, magged and pressure tested Heads are baked, blasted and magged for cracks Crank is cleaned and polished Rods are cleaned, torqued and touch honed as neededOct 2, 2011 ... ... 351m or 400. ... But I'm a bit biased, I'm debating swaping ... One thing I hear from alot of people is to not over-bore these 351-400 series ...Fill out a custom engine quote form and we will get a kit priced for you. All kits consist of assembled heads, intake manifold and camshaft. Horsepower 370 Torque 420 351cid. Horsepower 420 Torque 460 400cid. Runs on 93 octane with medium aggressive camshaft. Your provided OEM Iron cores heads mild ported. Custom speced camshaft.

Sanderson Headers Blockhugger Headers FC1-SEC. Headers, Block Hugger, Steel, Silver Ceramic Coated, 3.0 in. Collector, Ford, Pair. Estimated Ship Date: Jul 22, 2024 if ordered today. Jumpstart Your Next Project! Find FORD 5.8L/351 Ford Modified Headers and get Free Shipping on Orders Over $109 at Summit Racing! FORD 5.8L/351 Ford Modified Flywheels. Filter by Availability Filter Results Filter by Vehicle Individual Parts. Part Groups. Results 1 - 14 of 14 25 Records Per Page Default Sort . McLeod Aluminum Flywheels 563100. McLeod Aluminum Flywheels 563100 ...Sep 27, 2011 · Supercharging a carbureted 351 Cleveland. Ford's Modular engine program is in full swing and getting more than its fair share of press thanks to the recent introduction of the new four-valve (4V ... Sep 30, 2003 ... I guess I'm looking for a collective opinion ... I dont think the 351m engines were built for street racing. ... alot of my 351 stuff will work but ... Sanderson Headers Blockhugger Headers FC1-SEC. Headers, Block Hugger, Steel, Silver Ceramic Coated, 3.0 in. Collector, Ford, Pair. Estimated Ship Date: Jul 22, 2024 if ordered today. Jumpstart Your Next Project! Find FORD 5.8L/351 Ford Modified Headers and get Free Shipping on Orders Over $109 at Summit Racing!

Oct 25, 2019 · The 351 Windsor was available from 1969-97, making it by far the most common engine of the trio. As a final historical footnote, the introduction of the overhead-cam Ford Modular V8 in 1991 meant that the Windsor, Cleveland, and Modified engines represent the final pushrod V8s designed by Ford. Investopedia describes a modified Dutch auction as a sales technique for selling stock shares where the purchase bid starts high and gradually drops until enough bids are placed to...Build A 505HP Ford 351 Windsor. John McGann Writer Brian Hafliger Photographer Nov 20, 2014. See All 17 Photos. It's safe to say we've built a few 350 Chevys in the pages of Car Craft. Let's spare ...FORD 5.8L/351 Pulley Kits. Filter by Availability Filter Results Filter by Vehicle Individual Parts. Part Groups. Results 1 - 25 of 51 25 Records Per Page Default Sort . March Performance Ford 302-351W/C Serpentine Conversion Kits 1675. March Performance Ford 302-351W/C Serpentine Conversion Kits 1675 ...

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FORD 5.8L/351 Pulley Kits. Filter by Availability Filter Results Filter by Vehicle Individual Parts. Part Groups. Results 1 - 25 of 51 25 Records Per Page Default Sort . March Performance Ford 302-351W/C Serpentine Conversion Kits 1675. March Performance Ford 302-351W/C Serpentine Conversion Kits 1675 ...The 1971 and 1972 M-block 400 makes a good example to compare gross (260hp) and net (172hp) power ratings. There was no significant change in the 400’s specification (compression ratio, camshaft profile and timing, etc.) from 1971 to 1972, yet the advertised power rating dropped by about 33%. That lower rating was entirely a result of ... Edelbrock Performer 400 Intake Manifold is Designed for Ford 351/400 Modified Engines, 1971-82 400 c.i.d. w/ 2V Cleveland Heads & 1975-82 351-M V8's. Will not fit 1974 & earlier 351-C V8s. Accepts 4150-Style Square-Bore Carb. Non-E Edelbrock products offer improved performance and aesthetics for a broad array of vehicles and engines. Find FORD 5.8L/351 Ford Modified Bellhousings and get Free Shipping on Orders Over $109 at Summit Racing! $20 Off $250 / $40 Off $500 / $80 Off $1,000 - FINAL DAY! Use Promo Code: CARCARE. Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Make/Engine Search Departments; Brands; Savings Central ...In today’s digital age, PDFs have become an integral part of our everyday lives. Whether you’re a student, professional, or entrepreneur, chances are you’ve encountered a PDF file ...MSD Iridium Spark Plugs 3744. Spark Plug, 16IR5Y, Iridium Core, Tapered Seat, 18mm Thread, 0.437 in. Reach, Projected Tip, Resistor, Each. Jumpstart Your Next Project! Find FORD 5.8L/351 Ford Modified Spark Plugs and get Free Shipping on Orders Over $109 at Summit Racing!

Jul 28, 2021 · The 351C has a 9.206-inch deck height. The 351M and 400 have a taller deck at 10.297 inches. Cleveland crankshafts all look the same, however, they are different. The 4M crank has a 3.500-inch stroke and a 2.750-inch main journal. The 400 crank has a larger 3.000-inch main journal and a 5M stamp. The BoxWrench Engine Specs Database is a community resource for mechanics of all skill levels to access a reference library of Firing Orders, Distributor Rotation Directions and Block-Cylinder Numbering as well as Torque Specs, Timing Settings and Cylinder Head Tightening Sequences among other engine specs.Aug 17, 2023 · To put the new design into production, Ford spent big. "Ford Motor Company will release this fall a brand new $100-million engine designed for the 1970s," read an August 15, 1969, press release ... Object moved to here. Learn about the history, design, and performance of the M-block engine, a mainstay of Ford light truck powerplants from 1971 to 1982. The M-block engine was a de-stroked version of the 400 engine with a 4.00" stroke and a 9.0:1 compression ratio. It produced 351 cubic inches of displacement and was available in various models and options.351 Modified Stands On Its Own The final example of the 351 lineup is known as the 351M -- standing for "Modified" or "Michigan," depending on who you ask. Ford never issued an official clarification.351 Modified Stands On Its Own The final example of the 351 lineup is known as the 351M -- standing for "Modified" or "Michigan," depending on who you ask. Ford never issued an official clarification.Ford 351 5.8L with 425 HP Crate High Performance Motor Special Internet Price $6,699.00 This Eddies Performance Ford 351 5.8L Engine boasts 425 HP and includes a Edelbrock carburator and Performance Aluminum Heads. Listed are the engine specifications for our Ford 351W with 425 HP High Performance High Voltage HEI Distributor W/Coil A/C Spark PlugsFill out a custom engine quote form and we will get a kit priced for you. All kits consist of assembled heads, intake manifold and camshaft. Horsepower 370 Torque 420 351cid. Horsepower 420 Torque 460 400cid. Runs on 93 octane with medium aggressive camshaft. Your provided OEM Iron cores heads mild ported. Custom speced camshaft.Max. HP: 400-450. Approx. Price: $1,000.00. Comments: Like the Long-Rod 302 mentioned earlier in this book, the 351 Long-Arm kit uses a longer than stock connecting rod, which allows the piston to dwell longer at the top and bottom of the bore. This allows us to make the most of the fuel/air charge.With the heads and camshaft chosen, we're looking at two options in particular for our 351 Windsor build-the Trick Flow R-series intake manifold, and the Edelbrock Victor 5.8 intake manifold. The ...May 19, 2013 · I know, I know, just get a 400M or 460, right? Except the truck I bought has a BRAND NEW JASPER rebuilt 351 modified in it. Runs good, but its a dog. My goal is to improve low-end torque, dependability and maybe an MPG or two. Considering its a fresh rebuild from a reputable company, NOW would be the best time for a cam swap/timing set/intake, etc.

335 Series- 5.8/351M, 6.6/400, 351 Cleveland - good 351m cam choice? - Okay first off, the truck is... 77 f150 4x4 single cab, long bed 351m, offenhouser dual port intake, holley 650 carb (manual choke) True dual exhaust with thrush glasspacks (2.25 piping) Np435 4 speed, np205 t case 3.50 gears 4 skyjacker lift 33...

The 351 Windsor has a displacement of 351 cubic inches or 5.8 liters. The stock stroke of the engine is 3.5 inches and the stock cylinder bore is 4 inches. It has a distinct firing order from the other Ford Small Blocks, 1-3-7-2-6-5-4-8 vs 1-5-4-2-6-3-7-8. Cast out of iron, the bare block weighs in at between 150 – 200 lbs depending on the year. Despite their identical displacements, the 351s are not the same engine. Yet, each engine served its purpose, helping power Ford to new heights during difficult times. Let's take a closer look at the 351W (Windsor), 351C (Cleveland), and the 351M (Modified) to see if we can learn their mysteries.Microsoft Publisher is an Office suite program used primarily for laying out and designing publications, from websites and newsletters to business cards and brochures. However, Pub...The 351-4V: M Code. When Ford began to advertise the “new” 351-4V for 1970, this was the engine it was writing about. ... Most agree the “M” was for modified, but some claim it was “Michigan” or “Midland.” Ford never said what it meant officially. Of note, the 400 Ford has no designation, despite the commonly misused 400M ...NEW MERCH is now available. See link below....In today's video we begin assembly of the 351M V8 Motor. All peripheral parts are painted and ready for reass...A modified Trendelenburg position refers to when a patient is lying at an angle that elevates their feet and pelvis above their head. This position increases blood circulation and ...Starting with a bone-stock 351W truck engine, we bored the block 0.020-inch over, fitted KB flat-top pistons to the stock crank and rods, installed a Crane hydraulic roller cam, and reassembled ...Apr 10, 2008 ... A Moroso front-sump pan holds the Pure Power synthetic oil that Bob likes to run. The Melling M-Select pump runs that oil through a Pure Power ...Details. This MABBCO crankshaft kit is for a Ford 351M 5.8, model years 1975-1982. This crankshaft is identifiable by its #1K, #1KA, or #8M crank casting number and is commonly known as a "Modified." MABBCO crankshafts are cleaned, inspected, and ground on a world-class Italian crankgrinder.History of the Ford 400 Engine. The Ford 400 was introduced along with the 351 Modified in 1971. The 400 was used in many applications over the years. The 400 replaced the Ford 390, and it was designed for good acceleration for medium to heavy vehicles. The 400 is basically a stroked 351 – it had the longest stroke in pushrod engines at the ...

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Find FORD 5.8L/351 Distributors and get Free Shipping on Orders Over $109 at Summit Racing! Use your Summit Racing SpeedCard today, and get up to 10% back - Get Details! ... Distributors, Sniper EFI, HyperSpark, HEI Cap, Hall Effect, Billet Housing, Black, Ignition Module, Ford, Modified, 351 Cleveland, Big Block 385, Each. Part Number: SNE-565 ...351 M. First, contrary to popular mythology, the engine is not a "modified". It is a 351 Midland. Made at the Midland engine plant along with the 400M and uses the big block transmissions. The 351 Windsor was made at the Windsor plant and uses the small block transmissions. Sort of like the old myth of the Ford GT-40.This MABBCO® Master Engine Kit is for a Ford 351M 5.8 Modified motor, model years 1975 through 1982. Each kit is custom assembled using parts based on your engine’s requirements. Accordingly, we need to know the following: (1) model & year, (2) piston & ring size, and (3) rod & main bearing size. Have questions on parts or sizes, just give ...Supercharging a carbureted 351 Cleveland. Ford's Modular engine program is in full swing and getting more than its fair share of press thanks to the recent introduction of the new four-valve (4V ...This MABBCO® Remanufactured Premium Long Block is for a Ford 5.8 351M motor, model years 1972-1982. This engine is commonly known as a "Modified." Each MABBCO® long block is custom assembled as ordered so please call for current build times. MABBCO® long blocks include NEW pistons, piston rings, rod bearings, main bearings, cam bearings ...Sale. 351 Windsor Long Block Crate Engine. 2,895.00 Original price was: $2,895.00. 1,995.00 Current price is: $1,995.00. Our 351 Windsor Long Block Crate Engine is on sale. This popular 5.8-liter has one of the longest production runs of any Ford engine today, lasting three decades, through the 1970s, 80s, and 90s.This MABBCO® Master Engine Kit is for a Ford 351M 5.8 Modified motor, model years 1975 through 1982. Each kit is custom assembled using parts based on your engine’s requirements. Accordingly, we need to know the following: (1) model & year, (2) piston & ring size, and (3) rod & main bearing size. Have questions on parts or sizes, just give ...Feb 14, 2004 ... I know pretty good the difference between the 351 W and 351 C. ... The 351/400M have 3.0" mains like a 385 series and 351W ... "M" is for modified,&... ….

The motor mounts on a Cleveland and Windsor are the same, the 351M is quit a bit different, 351c amd M have the same valve covers while the Windsor is the same as the 289,302. Clevelands are good if they are built right 351M are good for scrap iron and the Windsor is the best of the bunch.The 1971 and 1972 M-block 400 makes a good example to compare gross (260hp) and net (172hp) power ratings. There was no significant change in the 400’s specification (compression ratio, camshaft profile and timing, etc.) from 1971 to 1972, yet the advertised power rating dropped by about 33%. That lower rating was entirely a result of ...With the heads and camshaft chosen, we're looking at two options in particular for our 351 Windsor build-the Trick Flow R-series intake manifold, and the …Build A 505HP Ford 351 Windsor. John McGann Writer Brian Hafliger Photographer Nov 20, 2014. See All 17 Photos. It's safe to say we've built a few 350 Chevys in the pages of Car Craft. Let's spare ... Professional Products PowerForce Harmonic Dampers 80006. Harmonic Balancer, Powerforce Series, 28 oz. External Balance, Nodular Iron, Black, Ford, 260, 289, 302, 351W, Each. Jumpstart Your Next Project! Find FORD 5.8L/351 Ford Modified Parts and Accessories and get Free Shipping on Orders Over $109 at Summit Racing! Stealth Black Ford 351C, 351M & 400 V-Belt System - Alternator Only with Electric Water Pump. Ford. MSRP: $344.00. $294.00. B-351C-ALT-SYSTEM-EWP. A v-belt pulley system for the Ford 351C, 351M and 400 engines with mechanical or electric water pump. Pulleys, Brackets and hardware included. Made from 6061-T6 aluminum right here in the USA.Good morning, Quartz readers! What to watch for today Greek’s radical left party tries to form a ruling coalition. A larger-than-expected margin of victory this weekend gave the an...Despite their identical displacements, the 351s are not the same engine. Yet, each engine served its purpose, helping power Ford to new heights during difficult times. … Trick Flow® PowerPort® Cleveland 195 Cylinder Heads for Ford 351C, 351M/400 and Clevor TFS-51616204-C00. Cylinder Head, PowerPort® Cleveland 195, CNC Street Ported, Assy, 62cc Chamber, 1.55" Spring, Ford, Cleveland, Modified, Each. Part Number: TFS-51616204-C00. ( 8 ) Estimated Ship Date: Today. 351 modified, FORD 5.8L/351 Intake Manifold and Carburetor Combos. Filter by Availability Filter Results Filter by Vehicle Individual Parts. Part Groups. Results 1 - 10 of 10 25 Records Per Page Default Sort . Summit Racing™ Intake Manifold, Carburetor, and Air Cleaner Pro Packs 03-0167 ..., Find FORD 5.8L/351 Ford Modified Flywheels V8 Engine Type and get Free Shipping on Orders Over $109 at Summit Racing! $5 Off Your $100 Mobile App Purchase - Get the App Vehicle/Engine Search Vehicle/Engine Search Make/Model Search, The new 351, nicknamed the Cleveland after Ford's Engine Plant Number 2, where it was produced, was yet another completely new engine from a completely new engine family Ford called the 335...., Federal Mogul Engine Re-Ring Kits 205624M-000. Engine Re-Ring, Moly, 4 in. Bore, Standard Rod, Standard Main, Ford, 351/400, Kit. Jumpstart Your Next Project! Find FORD 5.8L/351 Ford Modified Engine Rebuild Kits and get Free Shipping on Orders Over $109 at Summit Racing!, Find FORD 5.8L/351 Ford Modified Engines & Components and get Free Shipping on Orders Over $109 at Summit Racing! ... 62cc Chamber, 1.55" Spring, Ford, Cleveland ... , Elder User. Join Date: Jun 2001. Posts: 567. Likes: 0. Received 0 Likes on 0 Posts. Best timing setting ofr 351m. I believe that 6-8 deg. are basically emissions settings. most will probably run best between 10-14 deg. mine was set at 6 deg and I moved it to 12 and it opened the gate for a few more horses., 335 Series- 5.8/351M, 6.6/400, 351 Cleveland - Which series valve covers will fit my 351M??? - My girlfriend and I just got a '79 Ford F-150 4x4 pick-up from auction to use as a toy hauler for our new quads and trailer. . .this is my first Ford (although my Dad was a Ford man) so I'm a little unfamiliar with all the..., In today’s digital age, PDF files have become the go-to format for sharing and distributing documents. However, there are times when we need to make changes to the text within a PD..., Intake Combo, Weiand Action Plus, Ford, Modified, 351/400, Bolts, Gaskets, RTV Sealer, Carburetor Studs, Kit. Part Number: CMB-03-0122 4.5 out of 5 stars, Intake Combo, Weiand Action Plus, Ford, Modified, 351/400, Bolts, Gaskets, RTV Sealer, Carburetor Studs, Kit. Part Number: CMB-03-0122 4.5 out of 5 stars , The "302 pistons" might be based on 302 pistons but modified for use in the 351W bore size with the specific stroker kit stroke length. Benefits of a stroker kit: Increased engine displacement: This translates to more power potential, especially in the low-end torque range. , Good morning, Quartz readers! What to watch for today Greek’s radical left party tries to form a ruling coalition. A larger-than-expected margin of victory this weekend gave the an..., Jan 17, 2014 · Top Aftermarket Upgrades. According to Summit Racing, these Ford 351 Windsor parts are the most readily available (number of options as of 1/16/2014 in parenthesis): Lifters (68) Distributors (50) Valve Covers (49) Cylinder Heads (47) Camshafts (47) Exhaust Header and Manifold Gaskets (44) Rocker Arms (43) , Ford engineers took the new 351 cylinder head and modified it to work with the Tunnel Port block. The result of this engineering effort was the BOSS 302 engine, which became the Trans Am mill of choice for 1969-70 and beyond in SCCA competition., Find FORD 5.8L/351 Ford Modified Intake Manifolds, Carbureted and get Free Shipping on Orders Over $109 at Summit Racing! Use your Summit Racing SpeedCard today, and get up to 10% back - Get Details! Vehicle/Engine Search Vehicle/Engine Search Make/Model Search , Max. HP: 400-450. Approx. Price: $1,000.00. Comments: Like the Long-Rod 302 mentioned earlier in this book, the 351 Long-Arm kit uses a longer than stock connecting rod, which allows the piston to dwell longer at the top and bottom of the bore. This allows us to make the most of the fuel/air charge., Find FORD 5.8L/351 Ford Modified Engines & Components and get Free Shipping on Orders Over $109 at Summit Racing! $20 Off $250 / $40 Off $500 / $80 Off ... Cylinder Head, PowerPort® Cleveland 195, CNC Street Ported, Assy, 62cc Chamber, 1.55" Spring, Ford, Cleveland, Modified, Each. Part Number: TFS-51616204-C00. 4.88 out of 5 stars. …, Find FORD 5.8L/351 Ford Modified Rocker Arms and get Free Shipping on Orders Over $109 at Summit Racing! Free Mount & Balance for Many Wheel & Tire Packages - Contact us for Details! ... Rocker Arm, Stud Mount, Full Roller, Aluminum, 1.73 Ratio, 7/16 in. Stud, Ford, Bigl Block, Cleveland, Modified, Each. Part Number: SCC-SCP1023-1. 3.0 out of 5 ..., Apr 4, 2009 ... Here are a couple articles you may find interesting as far as rodding 351/400M's. ... It is said that the "M" stands for modified. These engines ..., Top Aftermarket Upgrades. According to Summit Racing, these Ford 351 Windsor parts are the most readily available (number of options as of 1/16/2014 in parenthesis): Lifters (68) Distributors (50) Valve Covers (49) Cylinder Heads (47) Camshafts (47) Exhaust Header and Manifold Gaskets (44) Rocker Arms (43), FORD 5.8L/351 Carburetors. Filter by Availability Filter Results Filter by Vehicle Individual Parts. Part Groups. Results 1 - 25 of 38 25 Records Per Page Default Sort . Holley 4160 Carburetors 0-80452. Holley 4160 Carburetors 0-80452 ..., Some later blocks also allow for the use of roller cams instead of flat tappet. Do you know the difference between a 351w, a 351 Cleveland, a 351 Modified, or a 351 HO? In the battle of 351 Windsor Vs 351 Cleveland, why should you pick the Windsor even though the Cleveland is a more powerful engine? This video goes into all that and even …, Because the 289/302ci based 351 was produced primarily at Ford’s Windsor, Ontario foundry and engine plant across the river from Detroit, it would be known as the 351 “Windsor” or 351W. The 351 Cleveland, due to its manufacturing location at the Cleveland foundry and engine plant in Brook Park, Ohio, was named 351 “Cleveland” or 351C., With the heads and camshaft chosen, we're looking at two options in particular for our 351 Windsor build-the Trick Flow R-series intake manifold, and the Edelbrock Victor 5.8 intake manifold. The ..., This has the added advantage of lowering the power curve on the 4V heads. Instead of peaking at say 7,000 RPM, now the engine will peak out at 6,500 RPM. Also with minimal prep on the bottom end with a stock crank and rods are safe to rev to 6,000. Here are a series of articles on the 351/400 series of engines., Aug 11, 2005 · 351 M. First, contrary to popular mythology, the engine is not a "modified". It is a 351 Midland. Made at the Midland engine plant along with the 400M and uses the big block transmissions. The 351 Windsor was made at the Windsor plant and uses the small block transmissions. Sort of like the old myth of the Ford GT-40. , Nov 18, 2021 ... Well this is a video series I never would have imagined making so soon and with such crazy finds inside the old 1977 351 Modified., Build A 505HP Ford 351 Windsor. John McGann Writer Brian Hafliger Photographer Nov 20, 2014. See All 17 Photos. It's safe to say we've built a few 350 Chevys in the pages of Car Craft. Let's spare ..., The "Cleveland" and "Modified" engines are all part of the "335 Series" engine family. Ford built the 351C engine between 1969-74. They also built the 400 c.i.d. engine, starting in 1971. The 351C was replaced by the 351M in 1975. The 351M was essentially a destroked version of the 400 c.i.d. engine. The 351M and 400 were available in cars ..., Find FORD 5.8L/351 Ford Modified Head Gaskets and get Free Shipping on Orders Over $109 at Summit Racing! ... Head Gaskets, RCC, 4.060 in. Bore, 0.060 in. Thickness ... , Fun Fact. In 1970, just one year after introducing the 351 Windsor, Ford introduced the 351 Cleveland—an entirely different engine from the Windsor, but also …, Sanderson Headers Blockhugger Headers FC1-SEC. Headers, Block Hugger, Steel, Silver Ceramic Coated, 3.0 in. Collector, Ford, Pair. Estimated Ship Date: Jul 22, 2024 if ordered today. Jumpstart Your Next Project! Find FORD 5.8L/351 Ford Modified Headers and get Free Shipping on Orders Over $109 at Summit Racing!, The Ford 351 Windsor, part of Ford's Windsor engine family, made its debut in the mid-1960s. Named after the Windsor Engine Plant in Windsor, Ontario, Canada, this V8 engine became a staple in Ford's lineup. ... The "302 pistons" might be based on 302 pistons but modified for use in the 351W bore size with the specific stroker kit stroke length ...