Thanks for all the replies. I like Lightholder’s Dads idea about removing the gauges and pulling the harness into the cab, then attaching the wires to the gauges while sitting on the bench seat. Pretty comfy vs laying on your back and working with your hands above your head. I have always hated that position! Next to decide on a moderately priced, quality wiring harness…..
Or is that an oxymoron?!?