P29 pistons, skunk2 manifold, LS throttle body, crower stage 2 cam, arp rod bolts, stiffer valve springs, adjustable cam gear, good header, get the whole bottom end balanced and get a good tune... I have seen all the way up to 180whp on a setup similar to this but you can expect anywhere from 150-160whp with an unmilled head... but you will be pumping 93 octane afterwards... I have done this build several times and it is a pretty nice setup... you will be surprised....