Yea this is all new to me. I have always had a sbc350. When I bought this truck I didnt have anything in it. The spid sheet matches all numbers to my vin on cab and frame and says it had a 292/ manual trans overdrive. I bought a th350 rebuilt and recently purchased the inline 250 which I helped the guy pull it out of his 67 chevy truck. I have not seen anyone with the same setup as mine. I might have to change the carb,manifold. I do have the cable for the th350 but just nowhere. I really do not want to have to change my carb out. Bummer.