98 ls1 trans am hp gains

i plan on getting an a4 98 trans am. planned mods are: 160* thermo, airfoil, slp full cold air intake, descreen MAF sensor, hooker cat-back and TB bypass(can u do this on the ls1's?). what kind of hp gains am i looking at? i was thinking around +40 hp at the crank? also what do u think itll run in the 1/4 with a pretty good launch. thanks for the advice. also how much will 3.73's help me in the 1/4?