I Ran my friend at the track last week in my 87 GTA. Both cars have an L98. He has a T56 swap, Cam and full exhuast. My only mods were are a cold air intake and a Dynomax super turbo muffler. To be fair he is still learning how to launch with his 6 speed and I got the jump on him off the light. My check engine light was coming on whenever I was WOT, code was for TPS (voltage high) and my cat is bad, once those are fixed Im sure I can do better. Here is what my timeslip looked like.

RT- .322

RT- 2.2

330- 6.2

1/8- 9.6

MPH- 75.1

1000- 12.5

1/4- 14.9

MPH- 94.5