Hy Jim Sears, the TH700-R4 for a V8 has the same bolt pattern as a lot of other V8 transmissions, Powerglide (aluminum case) 350, and 400 as well. Unfortunately none of these transmissions will bolt up to the 216/235/261 series of engines without an adapter (not the Hydramatic adapter). There is an adapter kit available from Buffalo Enterprises I believe, and possibly others. The kit includes an adapter and a special flywheel, unfortunately you must use a key activated starter, hope that helps.