Hi Everyone. 38convsedan, welcome to the forums, you should get some great help from the members.
You can get a start by checking VanPelt Sales' very helpful resources. It's not everything you will want, but it's something and I hope it helps. That company is very supportive of the hobby/industry.
http://www.vanpeltsales.com/FH_web/f...electrical.htm
Excuse me as I add some 9 year old advice from my dad, henryat1140, on the importance of grounding your 6V system.
https://www.fordbarn.com/forum/showp...9&postcount=11