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Canadian car identification here: Serial Numbers 1935-1964 | 1965-1966
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Thread: '63 401 crank casting numbers

  1. #1

    '63 401 crank casting numbers

    I found a '63 401 to use in my '64 Riviera but now I'm wondering if it will fit the 64 trans. The casting number page on buicks.net doesn't open for me anymore-did I do soething wrong?

  2. #2
    No, the hole in the rear of the crank to support the torque converter is much too large on a DynaFlow Trans. as opposed to a TH400. But, adapters are made to do exactly what you need. You grind the large flange off the rear of the crank & install the adapter. Then all you need is a '64-'66 starter, or you could make a shim & shim out the '63 starter about a 1/4"

    Tom T.

  3. #3
    Quote Originally Posted by telriv View Post
    No, the hole in the rear of the crank to support the torque converter is much too large on a DynaFlow Trans. as opposed to a TH400. But, adapters are made to do exactly what you need. You grind the large flange off the rear of the crank & install the adapter. Then all you need is a '64-'66 starter, or you could make a shim & shim out the '63 starter about a 1/4"

    Tom T.
    Thanks-what if I could find a '64 crank? Would it fit the block without any changes? Who has the adaptors for the 63 crank?

  4. #4
    Swap it over, but the adapter is the easier way to go. You will also need a flexplate for a '64-'66. I have & can get ANY of the various adapters needed.

  5. #5
    Found a 798 crank in the core yard.

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