I've got a 95 4x4 work truck with a blown 4.3. I also have a complete 4.8 out of a 2000. I'm going to swap in the 4.8 but still gathering info. Here are the questions I can't seem to find answers to:

Can I use my 4.8 harness to splice into the gauges and run them? I just need to find the "tach" wire on the 00 harness and connect it to the "tach" wire on the gauges? Same for water and oil?

Can I use the 2000 A/C compressor as long as I get the lines mated to the 95 lines?

I don't need to do anything to the wiring on my trans? It's an automatic.

The swaps seem pretty straight forward so far. I have access to AllData at the shop so I can print out diagrams until there are no more trees.