On my 66, I have a fused #10 wire switched by a relay (SPST) feeding an aux fuse block. I unplugged my pink resistor wire from the bullet connector off ignition switch and connected the relay to ignition switch. I ran a #12 wire off the new fuse block to my HEI and a #14 to my electric choke. They both get a excellent source of power and work great. No voltage drop from all that factory wiring harness!
Rehab is for quitters.