im using a set of stock style vortec heads in my s10. im running .534 lift, 1.6 roller rockers, Comp Cams springs (think they are rated for .655 lift). So obviously now im going to need to do some work on them. i need to mod the valve guides to accmomdate my springs and lengthen my pushrod slots. now, i figured while im at it might as well go all the way. can you put 2.02 and 1.6 valves in these? or just the 2.0 and 1.55 that GM uses on the step up vortec heads? also i was thinking of doing a 3 angle valve job cuz i had a 350 that was owned by a speedshop that was pretty basic (flat tops, balanced, fuel injected heads, and a 3 angle valve job) and im pretty sure the valve job made a world of difference. can sum1 tell me what a 3 angle valve job consists of? thanks.