5/8 Drive studs on our 'street' cars.

[ProCharged509]

What spline size are you running?

My Dana 60 is standard Mopar 35 spline. Currie sells a 35 spline unit for a 9" (made by DPI).
DPI Performance Racing Products, Inc.
345 Lakeville Street
Petaluma, Ca 94952
It appears to be the worm gear, torque sensing type like the Detroit Truetrac. Not sure how big of carrier bearings it requires.
I sure like how my Truetrac drives. Especially pulling the U-Haul in the rain...