my car has a 1970 396 (402) not sure if its a 4 bolt main or 2. My question is how many rpm can a stock 2 blot main big block handle. The guy who built the engine said the cam should make power to 6500 rpm. I shift at 5300 cause im not sure if the bottom end will handle 6500. I cant remember if he said it was a 4 bolt or two. I know its a cast crank. Also I have a steel crank from a 427. can I make this work in the 396? Thanks guys!