I understand that the old computer will run the LS engine - I have HP tuners and I've already licensed the LS computer, to use the old computer I'd have to license it for another 100 bucks. Would the extra 100 bucks and adding the extra 10 wires be easier than using the LS computer in my case? I do have another stock LS harness that I could salvage the extra wires and connectors from. I believe I have the auto transfer case - I need to check for sure....