I read about this mod on ws6.com, evidently its a popular mod among camaro, trans am, and corvette guys....all the LT1s. the site i saw it on had a before and after dyno and the guy gained 6-8HP.

basically, all it entails is bypassing throttle body coolant. by doing this it allows the intake air to stay cooler, thus more dense and containing more oxygen. the temperature difference just in the throttle body surface temp was ~20*. the after result on the dyno yielded 6.5HP and 7ft/lb torque. i did this on my truck and it seemed to be a pretty noticable difference, but its still running ****ty from a bad sensor i've yet been able to isolate.