Well Scott u got 2 choices. Do it right once or do rebuild after rebuild. U can go the easy route of a limited slip diff(i.e. trak lok, auburn, eaton) but be preppared to rebuild it. Or u can go w/ a locker type differential(powertraxx or trac tech c locker). IMO since u don't drive the car daily get a locker. It won't break. I have a c-locker in my daily driver but it's not bad as people say on the street. It's good to know u can drive to the track, dump it at 7000+rpms then drive home! -Mark