The instructions that came with the Bass said to leave the action as is, it was on the high side. Not sure about the string type or guage, but they were flat wounds.
I worked in a seperate building, the woodshop, this is where the instruments were made. The final assembly building housed the final sanding area, the paint dept. and the assembly area. Brian Carman of Pipeline fame, was the Lead man in the assembly area, he put the Bass back together. I could make a call and find out the specs on the switch and wiring, may take a day or a week but I'll call Chas and Brian and get some info. Harold Hayes passed away 3 years ago from respitory infections, we were very close friends that went to school together from 1960 thru 1965 and played in bands from 1963 thru the mid 70s' I'm thinking that the switch and controls were wired as a lefty, but I could be mistaken. The Bass was filthy sweat soaked when it came in for repairs, that is one reason for the cleaning and a thin coat of sealer, Paul must have put several million miles on it without ever cleaning it, perhaps it was just a tool to him that he played relentlessly.