Ok I was thinking 8.8 solid axle. Its a popular swap for S10 guys. The cobra IRS isn't all that great. My buddy has a 2000 Cobra R (yeah only 300 made) and it has quite an upgraded IRS from the normal 8.8, and an aftermarket cooler on it. It is over 500hp NA, (not stock) and he tracks it, mostly roadcourse but it sees the strip too. He's only running low 11s as its really not set up to launch (road course car) but he has had trouble with breakage and overheating. IMHO if you're looking for bulletproof this isn't it. Sure its been done, no one is saying it can't, but
1. You're not breaking stock stuff, why do you need it? /ubbthreads/images/graemlins/banghead.gif
2. If you are destroying stock stuff, how much better is this really going to be?
3. There may be better options. The Porsche axles, maybe cryo ring and pinion together may be as strong or stronger than the 8.8?