Thanks for all the great info. That sounds pretty cool. I do plan to use all my stock parts like oil pan, valve covers, water pump and I have the intake, carb and ignition. I guess the heads have to be figured out ahead of time before getting pistons because want they require a higher comp ratio? At least that is sort of what I get out of them because the alum heads rob heat? I did some more research on the stealth head and people do seem to like them for the most part. For the $ it seems hard to pass them up. I have the stock 906's but it sounds like they will need a ton of $ and work to come even close and may not even still be as good at probably a higher cost. I truly appreciate all the advice, knowledge and research you guys and offered. Thank you very much!