im doing a head swap on my y7(stock motor) to a y8. what is the difference on the bottom end of these motors if any? do i need to worry about overall motor life when doing this swap? let it be known that i am not going for 400 at the wheel here...i just want to make it go a LITTLE bit more than it does now...like intake, header-back, and possibly a cam down the road. drop the knowledge.