Hp gain HELP

i was wondering if i get a underdrive pulley system if it would actually help free up some hp,(1994 formula lt-1) the mods i have already done are
-cool air intake
-full exhaust pacesetter long tube headers w/ offroad y-pipe n slp loudmouth
-ignition
-comp cams rockers(1.6) and pushrods
-throttle body coolant bypass

It may free up a few ponies. I hear more about U/D pullies increasing throttle response more than concrete gains.

I've never heard good things about messing with pulleys

well how about the airfoils that mount on the front of the throttle body or the high flow mass airflow sensor, any gains there?

Nothing noticeable. The air foil is a basic bolt-on, and I think 90% of LT1 owners have one. Don't replace the MAF, just descreen it for now. They are good for 400+ hp. I've heard 500hp for LS1's.

what about these turbonators i keep hearing about, would they make a difference in a big mod out v8 like mine or would it be a waste of cash...thanks for all the help guys

Those things are a WASTE. If you are considering getting one, send your money to me instead.