Hello Robbaker, When I restored my 70. I bought all of my wiring harnesses from Year One. These were expensive but to me worth the money. They were an exact replacement so everything fit right the first time and also looks factory correct. I know of other guys that have used the Painless wires and they liked the products but had to do a lot of work to install. As far as the number of circuts to get it would depend on what and how many accessories you plan to run.

My 70 has 1 ballast resistor but is the double wide [4 terminal]. When I bought the new wiring kit. I ordered it, electronic ignition ready and that is why it uses the double resistor.

Bob