Your et and mph don't seem to be far off. I don't think the slicks are going to knock off a second. Back when my GN was brand new I went to the track for the first time and after a couple smokey over ancious (sp?) runs she ran 13.96 13.98 & 14.00 all at 98mph. Seems pretty close to what you are running. I guess that was with stock skinny butt Eagle GTs but anyway a full second might be a bit optimistic based on your mph. Kind of brings back memories. That was the first time I had ever been to a dragstrip I had no idea i was going to get pushed into running and the car was box stock. Man that was 22 years ago and I still haven't been able to shake drag raceing out of my blood. 🙂 Speaking of traction though a few summers later after some tuneing and minor mods i was running 13.4s and a buddy borrowed me his then hot off the press drag radials and I immediately went to 12.7s with no other changes. I did not know how much time I was loseing on the line. At the next tire change I went to drag radials (as it was a regular driver) and have never went back. You will love the slicks just don't try to pedal her home on wet roads or fly around an on/off ramp and you will be good. Well and watch the cops. Have fun.