how much stuff is interchangeable into a 62 904 case from a post-64 V8 904 trans? i have a well built 904 for a small block that i would like to use as much stuff from in my 62 case, what wont work, the valve body i guess, but the gears and clutches, etc?

How far "post '64" are we talking about? Almost everything swaps in from a '65. Less stuff swaps in from a '66 or newer.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

post 65 for sure, maybe 68? im not near it to check right now

If I remember correctly, the only parts that swap, after 1967, is the front section. Input, pump, clutch assemblys. Everything from the planetarys back will not swap. If you swap the front section, you will need the later torque converter. The later converter will not fit the early engine, unless you get a custom converter.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

On a slightly different note, I have a '64 cable-shift 904. What parts would need to be swapped in order to increase the number of clutch discs from stock? Can these parts be taken from a '67 and down V8 904 to avoid changing the torque converter?

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Somehow I ended up owning three 1964 slant six A-bodies. I race one of them.
Escape Velocity Racing