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flathaed v8 in front of model A rear end question

Discussion in 'The Hokey Ass Message Board' started by modelacrazy, Aug 2, 2011.

  1. modelacrazy
    Joined: Feb 24, 2011
    Posts: 104

    modelacrazy
    Member

    I scored a nice running '41 engine and I am planning on shoehorning it into my A frame. I'm locating a F1 crossmember to hold up the '39 trans. My question is can I get away with using the stock A rearend or should I use that old '47 rear I've got stashed? the engine is stock and I was gonna convert it to juice brakes anyway. Thanks guys for all youre input!
     
  2. I'm sure people have done it....but how long will it live?

    Personally I would use the v8 rear end. If the model A rear would work and live up to a v8 do you think old Henry would have re-tooled for a different rear end.....
     
  3. Petejoe
    Joined: Nov 27, 2002
    Posts: 11,153

    Petejoe
    ALLIANCE MEMBER
    from Zoar, Ohio

    That 47 rear would be the ticket. You already have the brake setup on it.
    I believe the 47 is an open drive shaft too.
     
  4. PG
    Joined: Jan 14, 2008
    Posts: 164

    PG
    Member

    It's been done plenty of times.
     

  5. modelacrazy
    Joined: Feb 24, 2011
    Posts: 104

    modelacrazy
    Member

    Pete the '47 is a closed drive shaft out of a sedan. I like the spring directly over the top of the housing were Henry put it and was hoping not to have to cut the driveshaft on the v8 rear if I went that route.It would be too slick to bolt the A rear right up to the trans and just put juice brakes on it. Just trying to avoid the big pitfalls and sweat,ha-ha
     
  6. modelacrazy
    Joined: Feb 24, 2011
    Posts: 104

    modelacrazy
    Member

    Thanks Hitchhiker,I'll check it out. Man I gotta say there is a TON of good info on here that otherwise would be trial and error for me-thanks guys for the input!
     
  7. T&A Flathead
    Joined: Apr 28, 2007
    Posts: 1,924

    T&A Flathead
    Member

    I just did this on my 29 A sedan. I put 3.55 gears in the rear and using a 39 box. I was leary about doing it but had someone put the rearend together that i trusted. I don't have a lot of miles on it yet, but I've been plenty hard on it during early test drives.
     
  8. modelacrazy
    Joined: Feb 24, 2011
    Posts: 104

    modelacrazy
    Member

    T&A thanks for the info. I figure those rears must be pretty tough if the midget guys used and abused them. Did you have to do anything different with the driveshaft?
     
  9. T&A Flathead
    Joined: Apr 28, 2007
    Posts: 1,924

    T&A Flathead
    Member

    no, i managed to squeeze motor and tranny in and kept stock length on driveshaft. I would recommend pulling the torque tube out and make sure the drive shaft is not weakened by a bunch of bad pits from being old and god know whats been in it.

    if you ever get up to KC area, let me know and you can take a look.
     
  10. Dago 88
    Joined: Mar 4, 2006
    Posts: 2,161

    Dago 88
    ALLIANCE MEMBER

    I have had a stock model "A" rear end in my A pick up for over ten years with a '39 merc flathead. It broke one axle in its seventh year but other than that no problem. It copped a fair bit of abuse, it even ran at the drags, maybe I was lucky but driven normaly I cant see a problem.
    Cheers Dago.
     

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