Good engine. I'm using same gen 4.3. The wiring harness will be a pain in the @ss to go through, but is documented on line if you have the patience. Computer will need flashed for operation in another vehicle without VATS. In cali the setup can be smogged if you keep all emissions equipment functional and use the factory trans. I know nothing of the t-case that's in that rig.

All that said, I'd say go for it. You can pay someone to go through the harness and flash the computer. I can put you in touch with a guy whose been doing these swaps smog legal for a while now...