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

DustyRoads said

Also, you cannot use your early torque converter on your late trany. The spline count on the input shaft is different.

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That is why I said you must change both the torque converter input shaft in the newer transmission to the older parts. I have read that, but never done it.

One might also machine the torque converter snout down, if there is enough meat there.