71 Gmc 2500 14 bolt disk brake rear end swap

[RR440MAN]

For you experts out there I am soliciting your brain! I have a 1971 GMC 2500 Sierra Sport Truck long bed, 350 / 350 TH front disk brake long bed White/green father and son project. The best thing about this is my son gets high school credit for his FFA Ag Mechanics SAE project in doing this hands on resto. It is undergoing a slow frame off restoration. The truck has the 10 bolt drum, 8 lug 4.10 ratio rear end. The 350/350 TH is being swapped for a 6.0 LQ9 engine and 4L65E tranny. Due to the age of the rear end, drum brakes, and 4:10 ratio it would seem fiscally prudent to switch a full rear end with disk brakes 3:73 ratio over converting a 73-87 14 bolt to disk brakes. Does anyone know a good swap for a leaf rear end that is of close measurement in width? I am willing to grind off the perch welds to line up with the correct OEM measurement. I cant seem to find any measurement data on these newer rear ends. I read somewhere that a 99-06 Chevy Gmc 1500HD 14 bolt rear might swap, but I need to confirm what will work before making a correct search. Any experts out there who can advise of a complete 14 bolt disk brake rear end that will work? 8 lug or 6 lug is ok. I can fit different front 6 lug rotors to the front, but I’m also good with the 8 lugs also.