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Technical sbc into 1940 Ford

Discussion in 'The Hokey Ass Message Board' started by 1946caddy, Sep 24, 2024.

  1. 1946caddy
    Joined: Dec 18, 2013
    Posts: 2,360

    1946caddy
    ALLIANCE MEMBER
    from washington

    Plan on installing sbc into stock 1940 Ford using stock transmission. I've already got the adaptor.
    Will this setup work without altering the wishbone?
    Will any chevy 168 tooth flywheel work if I have it drilled to accept the pressure plate?
    Can I get a diaphragm pressure plate to use with the stock t.o. bearing and arm?

    The rest seems like a typical engine swap.
     
    LOU WELLS likes this.
  2. hotrodA
    Joined: Sep 12, 2002
    Posts: 7,372

    hotrodA
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  3. big duece
    Joined: Jul 28, 2008
    Posts: 7,047

    big duece
    Member
    from kansas

    I would look for the GM 3729004 168 tooth flywheel, takes the 10.5 clutch. Ram 401 pressure plate, and Ram 212 clutch disk that will mate to the '40 top loader. Stock throw out bearing. The Ram is a diaphragm PP. Depending on which adapter you have, you can use the starter for 168 tooth diag bolt pattern, or the cast iron nose that has the 3 bolts.
     
    Last edited: Sep 24, 2024
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  4. 1946caddy
    Joined: Dec 18, 2013
    Posts: 2,360

    1946caddy
    ALLIANCE MEMBER
    from washington

    It's seems that I got more of a problem. The sbc I have is a 1988 and a one piece rear seal. The flywheel I need is a 1986 and earlier with the two piece rear main.
    Is there any way a later model flywheel will work?
     
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  5. Budget36
    Joined: Nov 29, 2014
    Posts: 15,335

    Budget36
    Member

  6. chevyfordman
    Joined: Oct 4, 2008
    Posts: 1,514

    chevyfordman
    Member

    I bought a project 40 with a 67 Chevy 327 engine that is using the stock running gear. So far what I notice is that the clutch is pretty stiff to release with the pedal. I'm guessing it has the 10 1/2 inch clutch from the Chevy so if that is what you are using, don't be surprised if the clutch is hard to release. Chevy used a long fork where the 40 uses a shaft that has to be rotated which I believe you lose the leverage needed to release the disc easily. My thoughts.
     
  7. big duece
    Joined: Jul 28, 2008
    Posts: 7,047

    big duece
    Member
    from kansas

  8. Dan Hay
    Joined: Mar 16, 2007
    Posts: 6,457

    Dan Hay
    Member

    I bought a flywheel that had the bolt pattern for a 50 Merc pressure plate already so it was all bolt in, no redrilling necessary
     
  9. big duece
    Joined: Jul 28, 2008
    Posts: 7,047

    big duece
    Member
    from kansas

    Yes, but was it for a 1 piece rear main application? I would have to do some digging to see if GM has a stock flywheel for 86 and newer that had a 10.5 clutch. The 3729004 GM flywheel has the Merc pattern you speak of.
     
  10. bangngears
    Joined: Aug 30, 2007
    Posts: 1,326

    bangngears
    Member
    from ofallon mo

    Use a Chevy diaphragm pressure plate with the ford clutch disc and a pilot bearing from Speedway and good to go
     
  11. hotrodA
    Joined: Sep 12, 2002
    Posts: 7,372

    hotrodA
    ALLIANCE MEMBER

    As I shared in my thread I used a billet flywheel from Summit, (Centerforce 700160) for a one piece seal crank, 168 tooth, drilled for both pressure plate patterns, with a Borg and Beck #1310 pressure plate (49-50 Merc) and disc (Ford) from Ft. Wayne Clutch, with 40 throw out bearing. Pedal effort is good with stock 40 linkage.
    upload_2024-9-25_10-39-45.jpeg
     
    Last edited: Sep 25, 2024
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  12. 1946caddy
    Joined: Dec 18, 2013
    Posts: 2,360

    1946caddy
    ALLIANCE MEMBER
    from washington

    It appears that I can use either a Ram 1530 or a 700160 flywheel. The 1531 is internally balanced and I'm needing an external balanced unit.
    Chevy diaphragm with ford disc seems the cheapest way to go.
    Thanks for all the input.:)
     
  13. 19Fordy
    Joined: May 17, 2003
    Posts: 8,371

    19Fordy
    Member

    In 1962 I had a 40 Ford convertible with a 265 Chevy V-8 in it. It had the Hurst motor mount and the set up
    used by hotrodA in his post. I think it was the stock Chevy flywheel. Wishbones were not split.
     
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  14. F-head
    Joined: Oct 20, 2007
    Posts: 1,482

    F-head
    Member

    If you use the 10” Borg and Beck 49/50 Mercury pressure plate the clutch is very easy to depress
    Easier than Ford Long type
     
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  15. Moriarity
    Joined: Apr 11, 2001
    Posts: 37,584

    Moriarity
    SUPER MODERATOR
    Staff Member

    does the chevy diaphragm clutch work with the 40 throw out bearing? My 40 has a 331 Caddy and I used a Ford truck clutch , I think it is an 11 inch? the clutch pedal on my car is very easy
     
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  16. 1946caddy
    Joined: Dec 18, 2013
    Posts: 2,360

    1946caddy
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    from washington

    I don't know. The only thing I've found so far is a quote from Squirrel.

    The bearing you use, depends on the clutch pressure plate. If it has flat fingers (diaphragm clutch), you use the long bearing. If it is a 3 finger or has angled fingers (diaphragm) you use the short bearing.
     
  17. Moriarity
    Joined: Apr 11, 2001
    Posts: 37,584

    Moriarity
    SUPER MODERATOR
    Staff Member

    there is only one type of throw out bearing for a 40 Ford. I am pretty sure squirrel us talking about the bearings you use when you are running a chevy transmission
     
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  18. lilCowboy
    Joined: Nov 21, 2022
    Posts: 154

    lilCowboy

    The borg&beck 49-50 merc pressureplate is almost impossible to find anywhere, you can find all the other pieces needed easily , but use a 56-58 Chevy flywheel if memory serves me correct, it’s drilled for the merc pressure plate
     
  19. 51 mercules likes this.
  20. big duece
    Joined: Jul 28, 2008
    Posts: 7,047

    big duece
    Member
    from kansas

  21. big duece
    Joined: Jul 28, 2008
    Posts: 7,047

    big duece
    Member
    from kansas

    To answer Moriarty's question about throw-out bearing, I understand stock can be used.
     
  22. 1946caddy
    Joined: Dec 18, 2013
    Posts: 2,360

    1946caddy
    ALLIANCE MEMBER
    from washington

    I think I'm going to try a diaphragm pressure plate with the stock throw out bearing. After all, what could go wrong?
    A friend of mine does own a slide back.
     
  23. Moriarity
    Joined: Apr 11, 2001
    Posts: 37,584

    Moriarity
    SUPER MODERATOR
    Staff Member

    I would hate to see you try this and end up not being able to adjust the clutch linkage enough to make it work. There must be a reason why every single one of these ever shown has used either a 50 merc or ford truck clutch. and they are 3 finger borg and beck style
     
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  24. 1946caddy
    Joined: Dec 18, 2013
    Posts: 2,360

    1946caddy
    ALLIANCE MEMBER
    from washington

  25. Moriarity
    Joined: Apr 11, 2001
    Posts: 37,584

    Moriarity
    SUPER MODERATOR
    Staff Member

    51 mercules likes this.
  26. 1946caddy
    Joined: Dec 18, 2013
    Posts: 2,360

    1946caddy
    ALLIANCE MEMBER
    from washington

    The two flywheels mentioned in post #12 are for 1 pc rear mains, externally balanced and are drilled for a Borg and Beck #1310 pressure plate (49-50 Merc).

    My Nighbor told me he had a 39 convertible with a 307 v8 and flywheel with the stock 307 diaphragm pressure plate and a 39 Ford clutch plate and linkage from a 1940 side shift transmission with column shifter. Said it drove great but was just a cruiser. He doesn't remember the name of the adapter bell housing.
    If I put the pressure plate in and it doesn't work, it will be pretty easy to switch to a three finger one.
     
  27. Moriarity
    Joined: Apr 11, 2001
    Posts: 37,584

    Moriarity
    SUPER MODERATOR
    Staff Member

    ok, I did not realize that this had been done before, I'll shut up now, carry on and good luck
     
  28. 1946caddy
    Joined: Dec 18, 2013
    Posts: 2,360

    1946caddy
    ALLIANCE MEMBER
    from washington

    chevyfordman likes this.
  29. From what I understand the reason for using the 49-51 b & p pressure plate is because it shares the same pattern as a Chevy pressure plate. And there was no drastic pattern change based on rear main seal. Helped swap a buddy's full size GMC from a vortec 4.3 to a vortec 350. We wanted a heavier cheaper clutch set so we ordered one for a 78 k20. Bolted right on. Worked like it should despite completely different linkage. And had the same pattern as my 57 Chevy flywheel. In fact as a result of most one piece rear main engines being bolted to light duty nv3500 transmissions the flywheels are almost guaranteed to have the smaller pattern....if not both patterns
     
  30. hotrodA
    Joined: Sep 12, 2002
    Posts: 7,372

    hotrodA
    ALLIANCE MEMBER

    @1946caddy
    I’m sorry, my mistake.
    Post deleted.
     
    Last edited: Sep 30, 2024

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