For ideas you can always check out my build page
https://www.camaro6.com/forums/showthread.php?t=575560
I don't list my engine mods because living in California your not suppose to have anything. But I will comment that an air intake, new exhaust, larger ported throttle bottle, and a tune from Overkill would be a good starting place. The first two, depending on what you go with, should put you at about $1,000.