i would reccomend, itr cams, intake manifold, headers 2.5" exhaust, leave the rest alone. with those mods you'll be scratching at the 175whp mark maybee alittle more.. depending on the tuner. sounds as if you already have a programmable ecu of sorts so most of the probs are taken care of. my old c4 i had these mods and my UNTUNED (mild street tune using s300) hp went from 154 to 171 and tq went from 114 to 137 . all at the fly... but my motor is in a mini.. its as fun as it sounds dyno's are just a tool. remember that. one dyno could say 180whp another could say 220 whp. the dyno i went to was a hydraulic dyno that hooks to the hubs, they are the most accurate you can get but they only deal with the power at the wheels. theyre called the heart break dyno. if i took my mini to another rr dyno it would say something rediculous like 240 bhp, all because of the wheel size/gear set im using.