AWD vs RWD

Your present perch to perch width is 43-1/2 and WMS to WMS dimension is 60-5/8, your E body axle is 46 perch width and flange to flange is close to 61-1/2 inches. Sell your Dana 44 while the market demand is still good and weld some perches onto your 8-3/4. Use the money to buy some 4.88s or 5.13s and a spool.
Best money you will spend toward the whole project. Don't forget to go ahead and add your ANSI approved wheel studs. Mopar 8 3/4" (8.75) Lightweight Spool