Here's a little reading material for you, don't know if you did the internal regulator conversion off hand..
http://67-72chevytrucks.com/vboard/s...d.php?t=417872
Also if you do a Google search for this "67-72chevytrucks schematic" and click images there is some good copy's to save to the computer.
https://www.google.com/search?q=67-7...NnBosQ_AUIBigB