I was looking at swapping a 6.0 with a 4l80E into my 88K1500 to replace the TBI 5.7 and 700R4. I know I will need a donor truck with the engine, tranny, wiring harness, ECM, and I will have to modify driveshafts, rebuild and adapt my NP241, rewire guages, new fuel pump/tank, radiator w/e-fans, external tranny cooler and oil cooler, motor mounts, relocate (fabricate?) tranny crossmember. Anything I'm missing here? And how much money do you think I would have invested into it? I'm looking at $3000-$5000 for buying the donor truck, using everything, and then selling it again for any usable parts and modifying stuff. I realize that it'll probably end up at about $8,000 with my luck. Thanks for any info, and has anybody out there done this?