im collecting parts for 6.2/4L80E swap into my k5. i bought the computer for 6.2/4L80E combo, but i still need to find the wiring harness. do i need a wiring harness for 6.2/4L80E combo, or can i get a harness from 350/4L80E or 454/4L80E? would a harness work from a 2wd?