I am also sorting out the wiring aspect for the dash. It is a bit of a struggle integrating the Holley EFI system and the Dakota dash. Dakota requires you utilize their components to read correctly with their dash. I have most of the harness done. Make no mistake this is the outside edge of my electrical ability. Appears I can’t weld it so I am stuck using alternate methods! Like reading the directions and schematics. My new hurdle is there is no Holley tranny harnesses so I will need to explore OEM wiring diagram and figure out which pin on the plug is for back up lights and neutral safety switch. I will utilize GPS for speed sensor so that portion is not so bad.