I have a 1940 1/2 ton. It has a leaking 8 volt battery and I want to go back to a 6. The guy I bought it from mentioned that he made some adjustments to the electical system. I have the shop manual, and it looks like I can really mess up the regulator if I don't mind my P's and Q's.

Any advice on how to proceed? Thank you for all your help.

Mark