I guess I showed my habits with the "rwhp"! But no I am not a mechanic, I am a machinist an I try not to talk out of my a$$. I try to live by the adage that it is better to keep your mouth shut most of the time and let them think you are an idiot rather than open your mouth and confirm it (Unless you are pretty damn sure you are right). Like I said on another post, 75% of my work is domestic 2 valve, but over the last year or so I have been working on a significant number of 4 valve heads/engines and always trying to glean more info about them. There are a lot of knowledgable people out there but there are also a lot of misguided ones. Just trying to sort them out and give a hand.