I had to make the tail light harness for my flare side as I had nothing.
I started with a style side harness and cut it to work for the flare side.
I also had to make the plate light harness from a pig tail of the socket.
I was able to get new Grote tail lights think off Ebay as it has been years since I built the truck.
I was able to get the plate light bracket off Ebay.
Plate bracket I bought from Reamer.
BTW the inside of the tail light housing were painted white from the factory IIRC.
I had to paint my after market ones.
As for light grounds I have a metal ribbed floor from a style side on my flare side so I never had a problem.
Dave ----