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Projects Toploader to Flathead Question

Discussion in 'The Hokey Ass Message Board' started by Nos1partstore, Apr 20, 2022.

  1. Nos1partstore
    Joined: Jun 20, 2012
    Posts: 291

    Nos1partstore
    Member

    Dumb question, but Will my 39 topload tranny bolt right up to a later flathead, like the one pictured?
     

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  2. tubman
    Joined: May 16, 2007
    Posts: 7,952

    tubman
    ALLIANCE MEMBER

    Assuming that's an 8BA type flathead in the picture (it's pretty small), it will if you use an '49-early '51 Mercury or '48-52 Ford truck bellhousing. The Merc's are pressed steel while the truck bellhousings are cast iron. Make sure you get the starter plate that matches the bellhousing. The clutch will be a mixture of early and late parts.
     
  3. Marty Strode
    Joined: Apr 28, 2011
    Posts: 9,588

    Marty Strode
    Member

    You will need a Merc bellhousing 49-50, or one from a 48-52 F-1
     
  4. 19Fordy
    Joined: May 17, 2003
    Posts: 8,314

    19Fordy
    Member

    As has been said the answer is yes IF you use the correct 49- early 1951 Merc stamped steel bellhousing with matching starter plate or the 1948-52 Ford truck cast iron bellhousing with matching starter plate.

    In my 40 Ford I used a 49-50 Merc stamped steel bellousing with matching Merc starter plate to bolt the stock 1940 Ford transmission to the 8BA engine A 1939 Ford top loader transmsiion would also have bolted up with no problems. I also used the stock 1940 Ford throwout bearing and the 1950 Merc flywheel along with the Merc 10 inch pressure plate and clutch. I also used a 1950 Merc rear sump oil pan to clear the tie rods.

    Make sure your flywheel iis drilled to fit the clutch and pressure plate you will be using.
    No need to use an 11 inch clutch. Lots more weight and your left leg will hate you.

    Be sure to read the info about installing an 8BA listed here.
    https://www.google.com/search?q=ins...60l2j33i299.8193j1j4&sourceid=chrome&ie=UTF-8
     
    Last edited: Apr 20, 2022
  5. deucemac
    Joined: Aug 31, 2008
    Posts: 1,635

    deucemac
    Member

    Make sure of what diameter clutch you use. The stamped Merc will only take up to a 10", while the cast truck bellhousing will accept all up to 11" clutches.
     
  6. rusty valley
    Joined: Oct 25, 2014
    Posts: 4,214

    rusty valley
    Member

    11" clutch would be good if you are building a dump truck, not so much in a hot rod
     
    SEAAIRE354 and Desoto291Hemi like this.

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