I'm hoping to be heading to the track this sunday for some test and tune. I'll be running my 98' with the L31 Vortec 5.7 Here is a list of mods and let me gets your guesses on times. I'm trying to see how close my ideas are

Mods:
5.7 L31, ECSB 4wd Z71
gibson headers
off-road y-pipe 3in with no cats and flowmaster 40 series
open element intake
MSD 6-offroad ignition with MSD coil
Tunercat Tune (some basic delete stuff here and there, adjust shift points, a little more timing but it's still only 28deg full adv on a 9.0:1 motor)
stock 4L60E/transfercase
Detroit True-Trac with super axles and 4.56 gears in the rear (will be going 2wd mode until gears are matching again)
Nitrous Express EFI kit, will try out the 100hp and maybe the 150hp pills
aerodynamic tonneau cover (hahahahaha)

It will be an 1/8 mile track. I'm guessing low 9 high 8 second E/T's around 75-80mph