Originally Posted by Scott Turvey

What I meant by "no difference" was between the Comp lifters (reg & R), not stock. Thanks though

I looked at the other lifter you talked about in your next post, and I'm going to call them. It's one of those things you just don't bother with, but it's bugging me now. I mean, "designed to perform at higher engine speeds... when the lifter inevitably pumps up" (Pro Magnum lifter) and "designed for Craftsman Truck and Busch Grand national applications" (Gen III lifter) doesn't really explain it to me.

I'll post after I talk to Dave (Comp)