New Comp cam issues

Maybe try tighter or looser lifter preload?

I've got a Comp custom grind with similar lobes in my 340 (Mopar Xtreme line) and it does clatter a tiny bit, but it's not bad in my opinion.

If the noise is centered in one area of the engine, it's not the lobes. Something's going on. Time to pull a valve cover and investigate.