Using a 21 circuit EZ wiring kit and I am in the finishing stages of re-wiring my 52 complete with AC with trinary switch, electric fan & relay, electric fuel pump radio, turn signals, etc.
I am keeping the 6 volt dash gages with a voltage converter.
I didn't like the rear wiring running on the floor so I came out the firewall, down and inside the frame to get to the rear.
I am pretty good at automotive electrical and wiring but would never have finished a re-wire without the kit with all the additional items that were original on the truck.
It is a little daunting when you first start but by taking the sections and going one wire at a time it will come around.
Their tech help could not be better. When you call you talk to the man that makes the units and he knows every wire, it's color and where it goes off of the top of his head.
I use the same harness in my truck. I installed it several years ago and haven't had any issues with it at all.
The biggest tip I can make is to not cut any wire or make any termination until you are absolutely satisfied with the routing of it. On my truck I ended up routing the wires several different ways until I was satisfied with the layout (I'm glad I didn't make the final cuts/terminations until the very end)
Good luck, you'll be on the road in no time at all
I did the same to my truck. only I used the cheaper off brand. saved a few dollars. total mistake. it was such a head ache. It worked out in the end but took way more time than it could have. I recommend to all that are doing this to not cheap out on the wiring kit.