If you are putting a 700R4 on your 292 you won't need an adaptor Tom. It will bolt right up. Now the trans mount is a different story. Try and find an automatic crossmember from a 63-66 truck and you should be able to adapt that to the 700R4.

Ontario Inliners
1965 Chevelle
1940 Chev
1965 Chev Pick-up
1970 MGB Roadster