I finally took the wheels off both trucks.
Measured with drums on and wheels off. From face to face...between studs.
Stock with torque tube axle...62 inches. 6lug
C10 axle..................................64 inches. 5lug 10 bolt 8.5
A lot closer then I thought it would be. Tires and wheels are different and made it look like a lot.
So this should work...
