Another 318 to 383 thread

Engine, Transmission & Driveline

  1. Furyus67

    Furyus67 Member

    Messages:
    64
    Likes Received:
    13
    Joined:
    Aug 12, 2013
    Location:
    Baltimore, MD
    Testing the waters of going 318 to 383 in my '67 Fury III.

    Trying to plan things I wouldn't think about. What are some things I would need to change or headaches that would arise?

    I would need:
    Big block 727
    Different transmission mount
    New motor mounts
    Trans kickdown linkage
    Throttle linkage/cable
    Tranmission cooler lines

    The radiator, I need to look at the bottom outlets.

    Is the driveshaft the same from the 318 727 to the 383 727?

    Can the same torsion bars be used?

    I need to look at my FSM when I get home but I can't remember if the 383's used 5 leafs or 6. That would stink if they used 6 because I just ordered new set of 5's thinking I would use my current 318.

    I am using Kahn's thread titled 318->383 swap as well.

    Thanks for the help.
     
  2. 413

    413 Active Member

    Messages:
    288
    Likes Received:
    97
    Joined:
    Jan 28, 2019
    Location:
    NW USA
    Cooler lines, trans mount and driveshaft are the same.
    Throttle cable should work also.
    BB has a larger lower rad hose @1.75” instead of 1.5”
    You will need all mounts and brackets and such for a BB.
    What shifter do you have? Linkage will probably all still work if column, it did on a 67 B-body for me.
    Console shift is the same.
    The same T bars and leaf springs can be used, but they may be a lighter rate from the SB car. You can raise the front to hold the weight, but cornering May suffer some. See how it drives for you then upgrade if needed.
     
  3. mr. fix it

    mr. fix it Old Man with a Hat

    Messages:
    6,452
    Likes Received:
    3915
    Joined:
    Aug 14, 2013
    Location:
    Welland, ON
    Some of the engine wiring may need to be adjusted.
     
  4. Furyus67

    Furyus67 Member

    Messages:
    64
    Likes Received:
    13
    Joined:
    Aug 12, 2013
    Location:
    Baltimore, MD
    Found this from the "Engine eonversion help!" thread.
    "So.... To go from a 318 with a 727 to let's say a 440 (go big or go home), you'll need another transmission to start with. The old exhaust won't bolt up to the manifolds, so you have to change the head pipes. The radiator may have the lower outlet on the wrong side and you may have to come up with the proper combo of water pump and radiator to make it work. Wiring is pretty easy, just extending the coil primary wire should do it."
     
  5. Joseph James

    Joseph James Well-Known Member

    Messages:
    792
    Likes Received:
    396
    Joined:
    Jul 21, 2018
    Location:
    Asheville, NC
    What about torsion bars?
     
  6. Ripinator

    Ripinator Senior Member

    Messages:
    4,180
    Likes Received:
    2181
    Joined:
    Jul 31, 2013
    Location:
    Germantown, MD
    If I was you, I'd warm up that 318 Poly. You can get a bigger cam for it, and you can even put multiple carbs on it (it'll really wail with a pair of AFB four barrels). If you do a complete engine rebuild, you can do even more with higher compression pistons, a larger bore, etc. Poly engines can make a lotta power, therefore, you could avoid a lot of hassle doing a 383 swap and the car would still have its original engine.
     
    • Like Like x 1
  7. Furyus67

    Furyus67 Member

    Messages:
    64
    Likes Received:
    13
    Joined:
    Aug 12, 2013
    Location:
    Baltimore, MD
    Is mine a poly or LA? How can you tell the difference? Needing to magnaflux it and machine it and buy new pistons and everything was really starting to sound expensive and like a lot of work! Could you point me in the right direction to read the difference about a 318 poly and 318 la?
     
  8. Ripinator

    Ripinator Senior Member

    Messages:
    4,180
    Likes Received:
    2181
    Joined:
    Jul 31, 2013
    Location:
    Germantown, MD
    If yer valve covers look like this, its a Poly:

    ml-poly318-house-guest.jpg
     
  9. Furyus67

    Furyus67 Member

    Messages:
    64
    Likes Received:
    13
    Joined:
    Aug 12, 2013
    Location:
    Baltimore, MD
    yeah mine is an LA
     
  10. Furyus67

    Furyus67 Member

    Messages:
    64
    Likes Received:
    13
    Joined:
    Aug 12, 2013
    Location:
    Baltimore, MD
    img_20190916_172244-jpg.jpg
     
  11. Wollfen

    Wollfen Old Man with a Hat

    Messages:
    6,306
    Likes Received:
    3260
    Joined:
    Jul 18, 2012
    Location:
    Greenville NC
    The 318 is a nice little engine perfect for highway cruising and fuel economy. What are you after here? The 318 will easily do over 110mph. A 383 will give you a little more off the line for sure, but upgrading the 318 for more power by going with a torque cam and inlet manifold will have the same effect.
    Plus you save yourself the hassle of all that changeover headaches.
     
    • Agree Agree x 1
  12. Furyus67

    Furyus67 Member

    Messages:
    64
    Likes Received:
    13
    Joined:
    Aug 12, 2013
    Location:
    Baltimore, MD
    1967 Plymouth Fury III 318

    I need a new engine. Rather than spending thousands in a machine shop I have been looking for something I could drop in, or another 318 that has been running that I could to a simple overhaul (gaskets, seals, cam, intake), rather than have to have something magnafluxed, bored, honed, pistons, etc. etc.
     
  13. Furyus67

    Furyus67 Member

    Messages:
    64
    Likes Received:
    13
    Joined:
    Aug 12, 2013
    Location:
    Baltimore, MD
    I've come across more 383's in what seem to be running condition than any of the small blocks
     
  14. Ripinator

    Ripinator Senior Member

    Messages:
    4,180
    Likes Received:
    2181
    Joined:
    Jul 31, 2013
    Location:
    Germantown, MD
    Well. . . If I can't talk you out of it, I have a pretty complete 383 I'll sell you.
     
  15. The Goose

    The Goose Senior Member

    Messages:
    1,394
    Likes Received:
    1903
    Joined:
    Nov 21, 2016
    Location:
    Santa Clarita ca
    As the current owner of and past owner of many other small block c bodies all I can tell you is the only advantage in stuffing a big block under that hood is bragging rights. Pop the hood and show off those big cubes!!! That’s it.

    Stuff in a 340 or 360 and keep almost 100% of what you already got except for your MPG. Kiss that goodbye w a 340. I’ve 340’d a few c body convertibles over the past 30 years and they are every bit as fast as a 383 or 440 car. Your results may vary & don’t get me wrong I love Big Block c bodies but it’s not worth the hassle unless you’re already missing everything. Good luck w your project, just my two cents.
     
    • Thanks! Thanks! x 1
  16. 65pacecar

    65pacecar New Member

    Messages:
    45
    Likes Received:
    25
    Joined:
    Jan 20, 2012
    I am not a fan of the 318, so I would go with the 383 or 440 swap. If you want an easier time, you can do a nice 360 build and drop it right in.
     
  17. Kapt

    Kapt Member

    Messages:
    54
    Likes Received:
    19
    Joined:
    Dec 1, 2018
    Location:
    Northern CA
    I had a 340 in a Duster when I was in high school. Holy crap that little engine was fast!!! Much much faster than the 383 I had in a 68 Charger. I wish I still had that 340
     
    • Thanks! Thanks! x 1
    • Agree Agree x 1
  18. Furyus67

    Furyus67 Member

    Messages:
    64
    Likes Received:
    13
    Joined:
    Aug 12, 2013
    Location:
    Baltimore, MD
    Maybe I'll just be patient and wait for one of the small blocks to pop up.
     
  19. Joseph James

    Joseph James Well-Known Member

    Messages:
    792
    Likes Received:
    396
    Joined:
    Jul 21, 2018
    Location:
    Asheville, NC
    Last edited: Oct 31, 2019
  20. Turboomni

    Turboomni Senior Member

    Messages:
    4,436
    Likes Received:
    2009
    Joined:
    Dec 14, 2015
    Location:
    MA
    There are stroker kits to bump a 318 to 390.