I think since I have lots of time to finish the engine I will just save my money for a while and get some world products or some dart iron eagle heads, or whatever manufacture has a descent set of heads at a descent price, don't want to go over $800.00 for a set, and will probably get some with between 170cc and 180cc runners, still need cam help but another question is, if I run a set of 4 valve relief flat tops, what chamber size would I need to get around 10 to 1 compression, because thats about where I want to be compression wise, where would 64cc or 67cc chambers get me with a standard deck 350 and a .040 thick gasket?