That makes more sense...any idea if I can run NPI spark plugs or should I go with PI? I know as far as headgaskets the npis are recommened, correct? I have may have a few more questions on this swap along the way. I know there is a seach feature and i've read alot of good info but there is so much it that it can be kinda over whelming especially if you are looking for a specific answer.