Not a fan of KB pistons. They work ok I guess but make darn sure you have the ring gaps right or your pistons won't live period. Don't ever use nitrous and make sure it's warmed up before turning any rpms. Me personally I wouldn't put hyper pistons into anything but a mild street build.

I was going to tell you my preference for rockers is the crane golds and their variants (FRPP blue and TFS black) But I see they have gone WAY up since I bought any. So the comps will work fine.

That cam is pretty rowdy for a hyd cam. I suppose if your building a dual purpose engine then maybe it would be ok, but I would look for a solid flat tappet for a pulling engine.