My advice. Quit looking at that big pile of wires running every which way and concentrate on one system at a time.

You should have a manual with a wiring diagram. I'm not familiar with the Kwikwire harness but the ends of the wires will terminate the same as the stock harness. I'd suggest starting with the engine. Work one wire at a time, keeping in mind you want the routing to be neat. For wires that will be strung together, run them through plastic wire ties that are left loose enough to run more wires through as you go.

Solder all your connections and insulate them with shrink tubing.

Take your time, do it right and you won't have any trouble down the road.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.