Obviously you had the V6. I had an 84 GT with the Iron Duke. I never noticed the front end getting light, but the Iron Duke could only push the car to about 105.
No telling actual speed, but I had my '85 SE to an indicated speed of about 127, where the front was too light for me. It could have used a spoiler on the front, but then, it wouldn't have gone that fast.
Deep, steel/sand, loaded except standard radio and no smoker's; #08974
Mods: Kappasphere CAI, Clear Image Shorty Header, second horn, visor decals, mudflaps, tonneau cover, brake light flasher, trailer hitch, 'lil Chromies, trunk monkey, retune, DDMWorks backbone, GMPP Suspension, wood grain dash, Solo Quiet cat-back exhaust, deleted:Solo high-flow cat