There really is "no such" ignition switch. If you are using an ignition system that does NOT use a ballast, you can jumper the IGN1 and IGN2 feeds together. In the engine bay, this amounts to the "ignition run" feed that went originally to the ballast--and this also branches off to the alternator field, VR IGN terminal, and other 12V loads in the engine bay such as electric choke. IGN1 "run" GOES DEAD during cranking, and ignition power during cranking is supplied by the IGN2 contact, which jumpers full power to the coil That was normally brown and fed the coil+ side of the ballast resistor.
IF YOU are getting low voltage to the "run" line with the key in "run" one solution is to electrically cut the "run" line soon after it comes into the bay. Used the bulkhead connector end to trigger a relay, feed the relay 12V off the starter relay "big stud" and connect the engine bay end of the "run" line to the switched contact of the relay
The normal "path" for the run line is battery............starter relay.........fuse link.........bulkhead connector..........ignition switch connector..........through the switch.........back out the switch connector on the "run" line..........back through the bulkhead connector..........and branch off to the underhoold "run" loads
EACH OF those terminal points as well as the switch contacts are a potential trouble spot for "drop."
