A stock 7.5" with a gear swap, Torsen/Trutrac posu and 28 spline axles is strong enough for most. The 8.5" GN/442 and aftermarket 9" rear ends are definitely more but have superior gear ratios and strength.
For my goal, I think pulling the thread on the stock 7.5" with a gear swap. Now Googling "Torsen/Trutrac posu and 28 spline axles"!!!