Heres the deal. I have my rebuilt 350 ( parents some how blew my 383 and put in a 350 while I was in the army ) and it goes ok. But Im not Ok with just Ok. I want to put in a roller cam ( also I might stroke this thing out to a 391 when I have money) but I dont know everthing that I have to do different. Like what length push rods and will any vertical locking bar roller lifters fit the old blocks ect. and how would I change my valve springs for ones that accept greater lift. please help!