American Wire was my choice. I just finished a six year full nut and bolt on my 69. I have never done anything this deep on any car or truck before. I can turn a wrench but this was anything.
I added 130A alternator, Electric chock, msd Ing, Hi-torque mini starter, Ididit steering column, Driving Lights, Hurst shifter (back up).
The direction are all there and you need to read thru a few times, but it will be your guide. Everything that I added and more(electric rad fans, duel tanks, other gauge set ups), were covered. I had to learn wiring for the starter but that's what you learn HERE FOR.
I had got the truck back from paint at Xmas and started Jan 1st. The wiring was done in phases, dash, engine bay, rear, interior, It took two months for me to complete. I hid and covered and tested everything. When it came to put it on the road for the first time - it all worked.
If I can do it.....
Advise... good crimpers.
Luck, Al