I have a 96 Tahoe with a leaking spider injection setup on the Vortec 350 now and a spare LQ9 that I am going to put im because the 350 has 150k miles almost. I need to know what I need use from the Gen III chassis, what I can use on the truck now, if I can use one wiring harness and one ECU or if I have to have 2, who I can order long tube headers from that will work with a 4WD and has 1 3/4 primaries. It is important to me that all the gauges work and the swap look as it could have come that way. The LQ9 will be stock minus a small cam, and I'll probably put a very small like 2500 stall converter in it. I've read a lot about these swaps but people do them differently and suggest different parts. I figured here would be the best place to start and this is something I want to start getting stuff for now.