For a 3.0" pulley you will definitely need AT LEAST a cam/rockers, upgraded valve springs, and headers, (and maybe other stuff in order to run knock free). Other wise... you'll pop a piston faster than you would think.

An intercooler wouldn't be a bad idea for additional peace of mind, but they sure are expensive. More than anything you will need to learn to tune and scan/tune/scan/tune/scan/tune until you're happy with it and your car runs well.