I’m swapping a vortec 454 that I acquired from a 98 RV with 54,000 miles motor is in really good shape that’s why I’ve decided to swap instead of an LS. The truck is a 95 had a vortec 350 in it. What all do I need to do with harness to make it work. I also have the trans from the rv which seems to be a 4l80e I have engine harness from rv but it was cut when removed and I have both ECM that came with donor
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