Originally Posted by valtiel43
Well judging from what I've heard a posi rear seems like it will really unleash the beast in this car.
Your missing what everyone is saying. If your not having traction problems a posi rearend will do nothing for you. Sure it will lite up both tires when u do burn out but thats not your problem. You need to have your gears matched to the compression and cam of the engine and stall of the converter. I have an 86 cutlass that had a 7.5" rear end with 2.41 gears. They sucked. Great for highway cruising and economy but that's it.
U asked what breaks on them. Last summer my posi unit failed at about 250whp.... then the small axles are an issue and the small pinion and then ring gear deflection... 7.5" ring gear sucks. Not worth putting money into . Look up my post on putting a Ford 8.8" rearend in my gbody. Cost me a total of about $400 and has posi and 3.73 gears and a huge ring gear and big axles.