Thanks Tony, just give Jon @ Driverz a call, he will get you all set up with both the wheels and tires.
The Rear Backspacing is:
Drivers: 4.375"
Passenger: 5.00"
I guess you could say that they are about 4.625" BS. For some reason the axle was offset more than usual and caused this difference. The wheels are also set at the outer most edge as possible, so that might contribute to the larger difference as well.
I still have yet to find our Currie paperwork for the rear-end. Hope that info helps though.