Cool thread. I have a couple of questions I hope someone can help me with. I have both a 57/58 371 with auto, and a 64 394 with auto out of a Starfire. Are either or both of these a bolt in to a 49 88 or anything major have to be done to do it ? What engine would be better considering rebuild costs(budget minded) for the best performance, considering a street with occasional strip application, also keeping in mind as funds become available adding more aftermarket speed components later ?