That harness will not work. Why not try something like the holley hp EFI? By the time you buy a harness, computer, tuning software, and wideband(holley has one built it) it's more expensive than buying the holley setup. Plus the Holley has features to tune itself, 1 timing table, changes can be made while it's running, no stopping and turning the truck off 100 times to re flash the pcm. heck of a lot simpler to tune.