Hey Everyone, I have a 68 Galaxie 500 fastback. The engine was swapped out to a 75 351m/ 400. It runs nice, I just have two problems, it smells horribly of gas while running, and it refuses to shift. It has a C6 Auto. original to the engine, but no matter what I do it will not shift, except while on a lift with no load on the tranny. I have checked for vacuum leaks and cannot find any. I have tried everything I can think of! Does anyone have any suggestions for me?