I got my Hot Rod Wiring book from Speedway Motors (Lincoln, NE). http://www.speedwaymotors.com
I just did a search (hot rod wiring) on http://www.Amazon.com. The book I have, ‘Hot Rod Wiring’ and another that looks interesting, ‘How to do Electrical Systems: Most Everything About Auto Electrics’ came up.
I have a 1985 Mustang SCCA American Sedan Class road racer that has only brake lights, wipers, electric fuel pump, MSD iginition and the starter/alternator/battery. The builder wired the car himself and it’s scary to say the least. I plan to re-wire it in the future to include headlights and taillights so I can drive it to cruises and track events. I will probably buy a basic harness from Painless Wiring or another harness vendor to accomplish that.