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Is this a nailhead trans

Discussion in 'The Hokey Ass Message Board' started by 52plybizcoupe, Apr 11, 2013.

  1. Can any one tell me if this will fit a nail
    Buick Super-Turbine 400
    Fits Riviera, Wildcat and Skylark GS
    Bolts up to 401 and 425 Buick Wedge Chamber engines
    1964, 1965 and 1966


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  2. Baumi
    Joined: Jan 28, 2003
    Posts: 2,500


    Yes, it´s got the nailhead bellhousing, not a Dynaflow but a ST 400
  3. sweet thanks for the answer how hard is it to put one behind a 61 401 with a dynaflow on it now
  4. mastermannsr
    Joined: May 16, 2009
    Posts: 13


    Best guy to help you put this together is Russ he knows nailheads like the back of his hand the web site is You can also call him 530-272-1564.

  5. Lobucrod
    Joined: Mar 22, 2006
    Posts: 4,120

    Alliance Vendor
    from Texas

    You will have to put an adapter bushing in the end of the crank for the torque converter to center in and you will need the right flexplate for the trans. Also you will need a starter with the right nose piece on it. The dynaflow starter is longer.
  6. donut29
    Joined: Mar 6, 2006
    Posts: 1,518

    from canton MI

    ^^^^^Agree 100%
    Call Russ he should have the parts you need
  7. d2_willys
    Joined: Sep 8, 2007
    Posts: 4,101

    from Kansas

    Should bolt to any nailhead 57-66, but 57-63 will need the crank adapter bushing.

    BTW: If this is a 64 transmission it will only have 5 detents, as it is a single range 400. PRNDL. But it still is a 3 speed box, no intermediate range to pick, just L and D.
  8. Can I put a standard 400 valve body on to make it shift like a normal 400

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  9. mike hohnstein
    Joined: Dec 4, 2011
    Posts: 262

    mike hohnstein
    from wisconsin

    No, morphadite pattern. You won't find valve body gaskets either. At least I couldn't 15 years ago, last time I had one in the shop. Put it together with out, really stoned all the surfaces, dynoed fine, customer never complained. Leave it in D and enjoy.
  10. Buford
    Joined: Aug 30, 2001
    Posts: 314


    Valve body gaskets for the 1964 ST400 are available from Fatsco Transmission Parts NJ 800 524-0485
  11. ninosdad
    Joined: Aug 12, 2012
    Posts: 102


    Try and hook up the Switch Pitch two stall speed torque converter. B&M makes one I think, great find now a 401 or a 425 to spin it
  12. I just had one rebuilt for my 63 Riv. Rebuild with a new torque converter 65-riv trans $980.00
    But, in order to get it to work correctly, I had to get quite a few pieces.
    65- gas pedal assembly with with electrical for the trans, 65- front and rear driveshafts, 65 Crossmember, 65 posi rear end, 65 shifter (Which is quite different than 63 or 64) A 65 trans is longer. Also found out you cant mix the driveshafts because the lengths are different. 65 rear also uses a flange which is different.
    63, 64, and 65 where all quite different from each other. I would search out the parts for that year and see if you can adapt them.
    We're doing the swap at the end of June. I'll post pictures of the whole process.
    I hope this helps.

  13. That year meaning 64

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