Can I use a 67 904 on a 72 225 or is the crankshaft register hole size a problem?

Adam Berman said

Thanks, that's good to know. never thought I would have trouble getting a torque convertor. will have to look into this, one that fits my 67 904 trans AND BOLTS UP TO a later 69 slant 6 motor...... otherwise no point starting the rebuild.
Thanks

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There is no reason to spend the money for a special torque converter, for this swap, unless you want a high stall converter. If stock stall speed will suit your needs, just use the stock converter for the 67 trans, use a 68 up flex plate, and the crank adapter bushing.

PS: I sell the bushing for $25.00 shipped in the US.