Well LMC sells a complete kit for our truck, Cost is around 500. been awhile since I've looked. Check out this thread it will help you out.
http://www.67-72chevytrucks.com/vboa...d.php?t=344663 And most period correct kits your still going to have to splice your factory ends on, or buy new ones. I bought a Painless for the 64-66 trucks and I had to do the same. My motor was also swaped to a 350 so some things are diffrent. I would go with a kit it clears up a lot of stuff in the truck and gives you extra wires of ACC! good luck!