As I'm getting closer to buying a rebuilt long block, I've come across lots of info which is hard to sort out. The guy who I am planning to get my longblock from said to go with roller rockers and heavyduty springs for the heads. He said it you put any kind of a performance cam in with any lift to it at all, that the stock rockers just can't take the lift. I also mentioned the hyperpeurotic flat top pistons, which he said were a good idea, because as you add lift to the cam, you loose compression in the cylinders, so you have to gain it back with no depressions in the pistons, or whatever you gain from the cam, you'll lose from stock pistons. Does this sound right? Roller rockers add about 500 to the build with the flat top pistons.