Powertrax locker may be an option for you. If you don't mind the knock-knock sound when turning slowly since it's designed for off-road use. Otherwise it seems like a good rearend setup as I've had mine for 2-3 yrs now with lots of burnouts.
I'm using the 280H Magnum cam from Comp Cams and it works well in my 360combo. Drivetrain was built for street/strip action and it ran in the mid/high 12's with slicks before I bought the car.
http://www.compcams.com/information/Products/Camshafts/