Dear Mr. Hoyt;

The newer transmissions have the larger retainer as Brian says.

The 55-62 Bell Housing will work on all Chevrolet passenger cars except 49-54 and some trucks, as I recall. This is where you will need the adapter mentioned.

Call Buffalo for the particulars/prices etc.

Good luck. \:\)

John M., I.I. #3370

"There are no shortcuts to any place worth going". -Anon