I have 2001 4x4 2500 suburban. I got an entire 06 duramax 2x4 doner for $500. I'm willing to swap entire 06 harness gauges over to the suburban. Im not worried about rear A/C. But the 4x4 thing is my issue. Will the x case on the suburban work with the allison after I get it set up for 4x4 then...