I completely agree with 420nitro. You're kidding, right? 8.5:1 with an x cam? Please, take some advice from someone who has had several combos...DO SOME RESEARCH FIRST! It will save you're friend lots of money in the long run. He won't be wasting $ on parts that do not match. I'm not insulting him. I just don't want him to make the same mistakes I did.
