Regarding the wiring, I did a body off restoration on my '37 1/2 pick up. The truck came in pieces with almost no residual wiring. I ordered a complete wiring harness from Rhode Island Wiring and figured out where things go by deduction. I think I can help you with pictures which would be best by email; my email address should be in my profile. For the next week I am not where my truck lives so if you are patient I may be able to help.
Kent


1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix