1976 Slant Six. Adapter Plate

Charrlie_S said
I did not realize the engine was a '70's. So yes the crank has the large hole. But I bet the "nub" on the adapter is the small size. As they only used the adapter with the 67 and older engines (in 68 they went to the slant six 727 auto, and didn't need the adapter). It would probably work, though, as the bolts would most likely align it close enough.

The adapter fits over the crank raised lip, which is approx 2.125"/55mm od. The inner bore of the adapter (that accepts the torque converter pilot) is approx. 1.8125"/46mm id. The pilot on the adapter for a manual trans is approx .9375" I'd. Same as on this 70's crank. Again, factory unmodified parts.