Small Block Bell housing

3 or 4 speed? Slant 6 or small block?
Just so you know, '66 and earlier A bodies use a 9 1/2" clutch. If you're upgrading to the later 10 1/2" clutch, you'll need a special pivot mount and modified torque shaft to make it work. Available from Brewer's.
1963-66 A-BODY TORQUE SHAFT 10.5" BELLHOUSING CONVERSION - Mopar A833 4-Speed Transmission & Component Specialists