Why Are Edelbrock Cams Unpopular

You can't get the Performer RPM cam in a Summit grind. I couldn't find a summit grind with .488/.510

The regular performer, yes, not the higher lift/duration RPM grind.

There used to be more choices,I dont know about that grind for sure but I remember a few others listed that are long gone,p.a.w. phased out a bunch of grinds in their s.s.i. line as well a few years back-that is back when comp and lunati ect. werent nearly as economical for cam and lifter packages.