Tech / Tech Articles

Swap Sizing: Engine Dimensions & Tips for Popular Swaps

Ever since that first hot rodder dumped his Model A’s four-banger for a flathead V8, engine swaps have been a proven way to get the extra horsepower we all crave. Some swaps are no-brainers, particularly when you are swapping an engine for one of the same type—a 347 cubic inch stroker for a stock 5.0L in a Mustang—or going to a bigger engine in a chassis designed to accept it (like a big block in a small block-equipped Chevelle or Camaro).

But if you want to do an engine swap that is off the beaten path, it’s time to break out the ruler and start measuring. To help you determine if your favorite powerplant will fit, we have engine specification charts for popular Chevy, Ford, and Chrysler V8 engines. The charts will give you overall height, length and width of a fully dressed engine (oil pan, intake and carburetor, front accessory drives, exhaust). These measurements are general, and can vary depending on what equipment you or the factory installed.

There are also engine swap kits for putting non-stock engines into popular body styles—big blocks into 1955-57 Chevys or small blocks into Jeep CJs, for example. The kits usually include things like motor mounts and headers designed to provide clearance of the vehicle frame, steering shafts, and the like.

Since there’s more to engine swaps than just squeezing the engine under the hood, we also cooked up a list of things to measure and check for to help you perform a successful horsepower transplant:

  • Always check measurements with all engine accessories installed. That will help prevent catastrophes like bolting in an engine and finding you have a half-inch of radiator clearance.
  • Select the engine mounting method (rubber mounts, solid mounts, motor plate, etc.) before installation. The mounts used can affect clearances, especially height.
  • Double-check—make that triple-check—hood clearance, firewall clearance, and fan-to-radiator clearance.
  • Make sure driveline angle is correct. You may have to adjust engine location in the car to get the proper angle.

Engine Measurements

Chevrolet 262-400

Dimensions: 26 inches wide, 28 inches long, and 27 inches tall
Weight: 575 pounds
Sump Location: Rear
Starter Location: Right

Chevrolet 396-454

Dimensions: 28 inches wide, 30.5 inches long, and 29 inches tall
Weight: 685 pounds
Sump Location: Rear
Starter Location: Right


Width: 26 inches wide
Length: 28 inches
Height: 25 inches
Weight: 425 pounds

Ford 221-351W

Dimensions: 24 inches wide, 29 inches long, and 27.5 inches tall
Weight: 460 pounds
Sump Location: Front
Starter Location: Left
NOTES: 351W height to carburetor pad in 23-3/4 inches. 289-302 height to top of pad is 20-3/4 inches. Length for all 221-351W Ford is with short serpentine water pump.

Ford 351C

Dimensions: 24.5 inches wide, 29 inches long, and 28.5 tall
Weight: 550 pounds
Sump Location: Front
Starter Location: Right

Ford 429-460

Dimensions: 27 inches wide, 30 inches long, and 29 inches tall
Weight: 720 pounds
Sump Location: Front
Starter Location: Right
NOTE: Does not cover Boss 429.

Ford 352-427FE

Dimensions: 27 inches wide, 32 inches long, and 29 inches tall
Weight: 625 pounds
Sump Location: Front
Starter Location: Right
NOTE: Does not cover 427 SOHC.

Ford 4.6L SOHC

Dimensions: 28-5/8 inches wide, 28 inches long, and 26 inches tall
Weight: 600 pounds
Sump Location: Front
Starter Location: Right
NOTE: Width is valve cover to valve cover. Height is to top of valve covers.

Ford 4.6L DOHC

Dimensions: 30 inches wide, 28 inches long, and 29-7/8 inches tall
Weight: 576 pounds
Sump Location: Front
Starter Location: Right
NOTE: Width is valve cover to valve cover. Height is to top of valve covers.

Chrysler 273-360

Dimensions: 24 inches wide, 29 inches long, and 27 inches tall
Weight: 550 pounds
Sump Location: Front
Starter Location: Left

Chrysler 361-440

Dimensions: 29-1/2 inches wide, 30 inches long, and 29 inches tall
Weight: 670 pounds
Sump Location: Front
Starter Location: Left

Chrysler 426 HEMI

Dimensions: 29 inches wide, 32 inches long, and 32 inches tall
Weight: 690 pounds
Sump Location: Middle
Starter Location: Left

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  1. Pingback: V8 engine swap in 1949 Plymouth - Hot Rod Forum : Hotrodders Bulletin Board

  2. Thank you for the details. I’m in the process of dropping a 460 ford into a 1980 chevy stepside and it doesn’t seem like there’s much difference in big block size

  3. john pierce says:

    wanting to drop in aford 302 intk a 1990 mazda b2200 pickup need deminsions on trans.

  4. Jose Mauricio Rivera says:

    I need the dimensions for a Chevy LSX 376 B-15 to swap it into my Toyota. I want to start the body work now if it will be necessary.

  5. Hello, I am looking to drop a ford fe into a 1930 Oakland….not so sure if it will fit…any help?

  6. Pingback: What to do with my Willys - Page 2 - Pirate4x4.Com : 4x4 and Off-Road Forum

  7. I have ford 392 and was wondering if it will fit on a 1993 GT foxbody 5.0

    • OnAllCylinders Staff says:

      Hey David, as the old saying goes “anything will swap, with enough time and money.” Seriously though, we’re assuming your Ford 392 is a stroker based on the venerable 351 Windsor. If so, the 351W has been swapped into Fox Body Mustangs with much success. Though we’re not too familiar with the 392, assuming it has similar external architecture to the 351W, then a swap would be (relatively) straightforward. Keep in mind that you may have clearance issues with the hood/intake, headers, driven accessories, and oil pan–but those can be solved with aftermarket components or fabrication. We just posted a more comprehensive guide on external Ford engine dimensions too, you can check it out here, and then translate those measurements to your engine bay before beginning the swap.

  8. Pingback: Ford Windsor and Modular Engine External Dimensions - OnAllCylinders

  9. Hello, I want to put a Dodge 5.7 or 6.2 hemi in a 1986 Chrysler conquest. But need the dimensions in order to make the proper decision. Can you help.? Kevin

  10. chuck balon says:

    I have access to a 2010 ford 3.5 v6 w/front drive tranny. I want to install this into a 1988 porsche 944 w/rear wheel drive. Can the v6 be used in a rear wheel drive setup or will I have to get a rear drive 3.5. What kind of problems will I encounter. Will this be any more problematic than a ls v8?

    • Hey Chuck–that sounds like a wild project, but there’s a lot to consider. (For instance, are you retaining the Porsche transaxle setup?) We know folks have successfully stuffed the LS in a 944, but you should give the Summit Racing technical department a call (330-630-0240) and they can give you more specific advice on how to proceed.

  11. Bloodviking says:

    Most 460 ford engines won’t fit into chevy cars not only due to most having front sums while almost all gm cars and trucks use rear sump pans is that the sump won’t clear the chevy crossmember while the back of the block hits the firewall. Hence a 460 with 4×4 rear truck pan into a 79 camaro.


  12. Steve Boyle says:

    Transplanting a 05 ls2 into a 1970 x body Nova.Has a 350 chevy in it know. Are the motor mount dimensions the same. is the distance width wise on the heads where the exhaust manifolds bolt on the same. Haven’t found and drawings that show these dimensions. Can you give me some help.

  13. Daniel Wilson says:

    Hey On All Cylinders, thanks for listing all of the most desirable and practical engine swap choices. I can hear the faint sound of tape measures being put to good use in small garages everywhere !

    One small omission in the Ford “FE” group needs to be mentioned. It covers the 352-427 cubic inch engines but let’s not forget the popular 428 FE. The Cobra Jets are getting hard to find but they are still plentiful compared to the original 427 FE versions of Ford’s early “big blocks”. Thanks for including Ford’s superior Small Block from their “335 Series” of canted valve engines, the 351 Cleveland. Yep, that’s the one that DOMINATED Pro Stock and NASCAR back in the day. Now with two American sources reproducing Cleveland specific blocks in your choice of iron or aluminum alloy, and the famous Cleveland heads now available in aluminum alloy from multiple sources in Australia and the States, the Cleveland is back in a serious way. How serious ? In all motor configuration with NO power adders at the 2012 EMC Competition in the Extreme Street Class, 932 horsepower from 444 cubic inches is in the record books. That same builder more recently laid down over 1100 horsepower by adding more displacement to his Titus Alloy Cleveland block. The most banned engine in Motorsports history is back…..

  14. James Vigil says:

    I have a 2010 camaro i want to put a 396 big block munci e 4 speed in it will it fit

    • OnAllCylinders Staff says:

      Well James, as they say, anything is possible with enough time and money. We found this story from Super Chevy on a wild BBC-swapped 5th-Gen Camaro.
      Given the different dimensions between a BBC and an engine from the LS family (originally equipped in a 2010 Camaro), it’d be far from a drop-in swap–we’re hesitant to say a Mark IV Chevy Big Block equipped with an M20/M21/M22 would “fit” without significant modification to the hood, fenders, chassis, firewall, or transmission tunnel.
      If you really want to get into the weeds on your swap, a call to the Summit Racing tech team is essential here: 330-630-0240

  15. Wendell Bright says:

    I need to know if a big block Chevy engine will fit into a 1957 Chevy b150 sedan without modifying the car?

    • Hey Wendell, the short answer is yes, you’ll need to modify the car. The good news is, this swap is somewhat common and the modifications required aren’t as invasive as those found in some other engine swaps.
      But there are dozens of factors to consider–including where/how to mount the engine, what transmission you’re using, and what other modifications (brakes, chassis, etc) you’ll need to make to finish the job.
      A call to the Summit Racing tech department is a good place to start: 330-630-0240

  16. Monte Christman says:

    Will a 426 hemi elephant motor fit in a 2015 challenger and what is involved to do so. Thanks for all infro.

    • OnAllCylinders Staff says:

      Hey Monte, you’re talking about the GenII 426 (1964-71) Hemi engine, right? Well, anything can be swapped into anything with enough time, skill, and money–but the quick answer here is no. At least not without extensive modifications and very healthy checkbook. We’re talking a complete retrofit: tons of fabrication, new electronics, specialized engine mounts, modified firewall/transmission tunnel, probably re-routing components, custom headers, and dozens of other things we can’t immediately think of.
      It’d be far easier to either upgrade your current engine or swap-in a new Gen III Hemi crate engine. At either rate, calling the folks over at Summit Racing’s tech department will give you some more details, 330-630-0240.

  17. Will a 460/385 Ford eng. fit into a 1966 Fairlane with a Mustang 2 front susp from Heidtz

  18. Scott Martin says:

    I’m trying to shoe horn a 454 into a 67 cutlass and my headers and stock manifold are crammed against the steering column and there’s little room for anything to fit. It’s also sitting kinda high but the bolts line up on the motor mounts and fit. Just no exhaust! Is this doable?

    Thanks for any advice, as I’m losing my mind on this.

  19. Eric D Goodman says:

    I think you get your FE and the 460 length swapped around. The 460 has bigger bore, hence bigger bore spacing. I measured 30 on the 390 and 31.5 on the 460

  20. im wanting to swap a 2.8 chevy v6 with manual transmission into a 57 triumph tr3. need to get some dimensions on the engine n trans, can you help a guy out?

  21. I am trying to put a 5.8 engine out of a 89 van into a 1995 f450 any sugestions on motormounts ect.

  22. Looking to install a 5.8 L EFI out of a 1988 F1 50 into a 1953 F1 hundred that originally had a 239 flat head. Will this work without major modification and what is involved?

  23. i have a 1952 f8 ford truck it has a 341 or 368 lincoln engine in it with a 5 speed transmission . i would like to maybe put a 454 chevy or a 460 ford engine in it being the lincoln engine is tired and hard to get parts for. but i waswondering what kind of an adapter i would have to use to adapt one of those enginwes to the big 5 speed transmission

  24. I want to install a Ford 5.0 modular engine with a Ford 6R80 A.T. in a 1957 Lincoln Premiere. Someone installed a 1996 LT1 Chevrolet
    engine & GM 4L60 A.T. in it, but never got it running. The LT1 “fits,” but the engine compartment looks very crowded. It has been sitting so long that the tired old LT1 would have to come out for repairs. Any chance the 5.0 will fit with minor changes?

  25. Caleb moore says:

    Will a 7.3 powerstroke fit in a 57 chevy?

    • Caleb moore says:

      I have a 57 4 door sedan and an early 2000s f250 but my chevy is just a rolling chases so i cant make accurate measurements but im willing to make modifications to make it fit i just need it to fit under the hood

  26. Bryan Herter says:

    I have a 1950 Ford F1 pickup hot rod. It has a 350 in it on a camaro iroc frame. I would like to drop a 429 thunderjet in if I can get it to fit. Can the iroc frame handle the extra weight and power?

  27. Alan Young says:

    looking at putting a Ford 5.0 (1990) into 1973 Plymouth Duster. anyone done this

  28. Hi, I am considering a chevy 454 engine swap into my ’51 WIllys truck, are there any specific issues I should be aware of? I am planning on changing tranny, transfer case, and axles as well… Thanks for the great info on engine dimensions!

  29. I have a 2003 Toyota Tocoma Prerunner, what Chevy v8 will best fit in it and do you have a parts list for the engine swap?

  30. Ferdinando Muraca says:

    Hi , with a 302 block , I want swap to a 426 Hemi , how much taller is the block ..? Thanks for your time..

  31. michael astrom says:

    I wood like to install a 4.6 ford engine in a 1952 ford vicky

  32. michael astrom says:

    I wood like to install a 4.5 ford engine in a 1952 ford vicky

  33. James Jorgenson says:

    I’m taking a 77 motorhome with a Dodge 360 and putting it inside a 2003 BMW

  34. Any ideas on the ford v10? I have a 2010 v10 power train and thinking of swapping into a 1986 dodge truck. Any suggestions?

  35. Andrew Nielsen says:

    I have a mopar 413 out of a barracuda not sure the year but I have a 1990 chevy 1500 4×4 4.3l v6 I would like to know if it is possible and if so what does it all entail
    I’m needing this swap plz help


  37. I have a 1969 DZ302 and a th350 that id like to put in a 2005 dodge magnum that has a 2.7 V6. How hard is it going to be?

  38. Roy Griffin says:

    Wanting to put a engine in my 54 Lincoln that gives me room enough to keep the stock power steering Have a 390 available. Should a 351 or 302 be more applicable thanks Roy G

  39. Douglas Ballash says:

    looking to put a 77 oldsmobile 403 engine into a 71 c-10 truck. Will it fit?

  40. Swapping out a 230 six from my 65 gmc HandiVan and installing a 327 – just wondering if anyone here has done it. Hoping to find a doghouse from a 69-71 van. But it’s pretty hard to find. Does anyone know the specifics on cutting and fabricating an older doghouse to accommodate a v8?

  41. Gentlemen,

    I have a 1970 AMX. I want to put a HEMI in it. I am leaning towards a GEN III.
    I guess the first question is, will it fit? At least with reasonable amount of work and money.
    I also want to replace my stock hood use the shaker breather and hood.
    I am hoping it will bolt up to the torqueflight and I can leave the transmission in its current location. That way I don’t have to alter the console.
    If anyone has done this or might have any information please contact me.

  42. Jeff Santos says:

    I hope I am not too late to the game. Thank you very much for your insight into this subject. After all, it’s my understanding is that the title ” Funny Car ” was born from mix-matched bodies and motors. So again much thanks! I have a 73′ Ford Capri that stock had the 2000cc motor while I would much prefer V-8 muscle. Ford or Chevrolet? Yes time and $$$ can solve most anything. Pros and cons… I intend a full on frame attached so remains the engine bay accommodation as I can imagine a SBC would fit fine and have read a 5.0 Coyote motor slips in between the towers. Advice / opinions are solicited. Kudos !

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