http://67-72chevytrucks.com/vboard/s...d.php?t=539651
Look at this link. This are the items you need to do the swap. All you need to do since you have the relays already installed, is splice in the pigtails.
He already sold these items, but the part numbers are visable. There is another thread on here too that should have the pn's for the pigtails, I could not find it....
search bing/google for h13 buld connector and you should find them. Also search for h13 bulb connector diagram and it will tell you what wire is what...
here is one link for the connector pigtail...
http://www.repairconnector.com/produ...or-Socket.html