well i was wondering if you could put a two piston caliper off the 3rd gen iroc on a single piston 3rd gen for a upgrade? i was going to put cross drilled rotors on and was wondering if that could be done also.

yes, you can upgrade your brakes to the 2 piston caliper setup. everything needed to do so though, is unbeknown to me.

so is it not worth it?

it's always worth it.