Ok, I have been going back and forth trying to decide if I should try to rebuild the 324 in my 55 Olds or swap in a sbc. I am leaning toward the 324 even after I checked prices on parts. I am worried about the exaust system on this car, are there any block hugging headers that will work with this car? I do not see hardley any room for them and the stock system looks all twisted up and odd to me. would like a standard dual set up if it is possible. the next thing is that I know the trans is shot. is there a adapter plate that can be found to mate a late model trans to the 324 or am I stuck with the hydro? One last question, will the single front engine mount work for a sbc if I decide to go this way or will I need to fab up a different front mount for the sbc. I see no way to use side mounts at all with the steering box and collum where it is at. I look forward to all your oppinions and all the knowlege you can pass on to me.