Well, here is "where I'm at". I tore down this slant head I had the other day. To my astonishment, the guides weren't just good. They're real good. That's gonna save some dough........If the head isn't cracked. So, my plan is to go ahead with the 318 valves..........SINCE the guides are good. I am lookin at kits on Ebay for bowl and seat enlargement. Get hooked back up with Mike at B3 to get the geometry corrected and see if maybe I can either port it myself, or maybe get some local help. From what I have read, 75% of the flow improvement is in the bowl area anyway, so if I do a good job there, that will be most of it......hopefully. LOL