BTW, either today or tomarrow I will get some more info on the heads that were on the 350 before I removed them. I believe they had pretty big chambers like 72cc but could have been 69 so that is something I definately need to figure out. I was going to buy some Vortec heads but not sure how much that will help me with power and keep good fuel mileage or if it will even help for around $650 bucks from summit.