johnny 5, bad azz z28 are all i can think of off the top of my head, i think scary guy might have also but not sure. ive read stories on ls1tech about a couple guys breaking them from a roll, i did a differential swap on one a month ago where the ring gear literally fell out in pieces when i took the cover off. my old LT1 the gears started whining after a couple trips to the track, and would only spin one wheel during the burnout.
butt on the other hand there are a lot of people cutting good 60’s. BLKUUS6 has stock gears and cuts 1.9’s, and his rear has been in one piece for a couple seasons now.
my current one is staying together fine, but i cant launch the car good yet, and i dont want to put slicks on it. i only cut 2.1’s with 295 BFGs, bogging or spinning.
what tires and gears are you running cougar?