Thanks for the replys. Now that I know what block and head to look for I have some other questions. With an inter cooler, how much boost can a stock motor take and still live a reasonable amount of time. Do you need to put larger valves in this head? If so, what size and kind? Does anyone make pistons for these engines or must one order custom pistons? Who makes the best rods? I would like to try for at least 450Hp. Is this reasonable for this engine and still be able to drive it hard? I like to attend track days or driving schools as some are called. Some street driving also.