Are there any manuals that can assist me in the process off changing to a negative ground?
Hi Rob, and welcome to JL.
Here’s a search showing 50 topics which mention polarity change.
It’s pretty straightforward if you haven’t got an electronic ignition, or fuel pump.
Do you have a period radio? There are online resources to assist if you do, as some don’t have a simple polarity change switch. Paul
Didn’t get any seach icon
Oops, forgot to paste the link. Here it is: