[Rich Biebel]

Advance the cam and you'd have a little more exhaust clearance. Yes you'd lose intake clearance but since your exhaust side is so tight, I'd move it.... What lobe was the lifter that broke exhaust or intake? I'm not saying it hit since you say there is no mark but I'd be more comfortable with a tighter intake side and most engines like the cam advanced. Shubeck lifters appear to have a real high failure rate and if they have a specific running clearance to the lifter bores......why isn't that info given to the buyer of the lifters!......The Nascar stuff looked like the way to go.......