Buy an 8.8 with 4.10s in it! You will save money and the swap is easy! I have the cobra flange you need if you decide to swap! Ill save you some money on that if you just want to pay me $10 plus shipping!
Beefier and can withstand more, plus for the price of install and parts for your 7.5 you can buy an 8.8! I bought an 8.8 for $500 when I had my v6 and never installed it. Sold it for $500 a few months later. And the one I bought was from a gt500 but its the same as a gt just different gear ratio.
havnt done it myself, but i cant imagine a rear end swap being much more difficult than suspension swap combined with minor DS/brake work, just undoing a bunch of bolts then rebolting it up