One of these days I'm going to sit down and write down all the things that I wish my present self could tell my new Gbody owner self 10 years ago.
To the OP; If instant gratification is a factor, I'd probably suggest picking up another 7.5 with either 3.42s or 3.73s. Then I'd swap it in and hang on to the original for a just-in-case spare. There are a few reasons I am suggesting this. First, it's a 100% direct swap. Second, it's probably going to be cheaper than regearing your current rearend. Third, it's the least expensive way to audition a ratio. If you find you don't like it, sell it and try a different one. Fourth, going from 2.4Xs to 3.42s feels like you added 100hp under the hood. And fifth, it'll make it more fun while you're deciding what you really want to do with the project. And when you're done, you should be able to sell that 7.5 for what you paid for it when you install your 8.5/8.8/12bolt/9".
7.5s will last a good long time if you don't mercilessly beat on them. They will not tolerate a gravel to asphalt burnout.
I found a 7.5 gm 10 bolt with 3.73s but it doesn’t seem to have the UCA mounts
He doesn’t know what it came out of but it should still work with one of maguvers conversion kits right?