Plug-and-Play Wiring Harness

I realize this is an older post and maybe no one following anymore but I'm just now at the point in my restoration of a 67 Barracuda FstBk that I am looking at wiring system. Since I pulled everything out of the inside of the car including carpet as well as everything in the engine bay, I figured a good time to just rewire the whole car while everything is more easily accessed. Ounce of prevention vs pound of cure, right.

Anyway I am looking at the American Autowire kit# 510603. I kinda like the idea of the GM style bulkhead with the bolt connecting the interior fuse block to engine bay instead of just snap fasteners/connectors. I was wondering if anyone had actually installed one of these personally? Any issues they ran into? My car is a 4spd, so wasn't sure if the kit may be for a column shift automatic or 3spd std on column. Mopar may not have ever made a 3 on the tree but just thought I would ask.

Thanks everyone