Yep, that's why mine is sitting here in a box and not in my lifter valley! The Comp kit requires "full-round" lifters. :rolleyes:

Pretty much every cam company makes a kit. HydraRev is just AFR's brand name for it.

With the engine apart, it can be pretty inexpensive insurance against valve float. I wouldn't expect tons of power or whatever. But it's good to have them on high-winding engines. Any kind of roller lifter is heavy and risk launching off the nose of the cam. Roundy-round guys use them alot. I'd have one in if I had bought the right one at that point of my build-up. But it didn;t fit and I was like "eh" and put it aside.