Re. tail light wiring.
I got tired of the rats nest from previous attempts by original owner to rewire trailer connectors and who knows what else. I bit the bullet and bought a tail light wire set from one of our vendors. Perfect fit and looks a lot neater.
Lot of previous posts on ground issues and what to do. Here's one.
http://67-72chevytrucks.com/vboard/s...t=ground+strap