Well my Z28 will run 11.90 on a 10 inch drag radial the way it sits now, engine is an LQ4 with Scat rods, Mahle pistons, junk 853 heads (ends up at 10.2:1 compression), TSP 233/239 cam, made 390rwhp through a 4L60 and 9" 3.75 gears, went a best of 11.60 at 117mph really leaning on it with a 4200 stall, 11.5" radials and a 1.53 60'.
I've been happy with the way the car drives, recently put a tighter 3000 stall in it which is a little small to be doing as well at the drag strip, but I'm not really interested in that anymore. Let me know if you have any specific questions I'd be happy to try an answer them as it sounds like you're going down a similar road.