Front spindles/hubs as I used require dished wheels to match duals on rear. If one uses non-dished wheels on the front, then singles on the rear, then suitable width D-80 axle will have to be found or special wheels made. Not sure if that has answered your question?
Might need to get high gear ratio in your D-80 if using original trans.
Another question answered above might provide additional answers.
Ed
ED, I have a lead on a 2000 Chevy 3500HD complete front axle assembly, It was cobbled onto Chucks 1959 LCF Truck. The steering linkage is forward and I thought all 3500HD axles from '99 to '02 had the linkage behind the axle?
