My current 1950 Ford Tudor...when I got it JAN1970, it had a spare dash-mount interior light switch (pull to turn on) mounted in the back of the glove box.
Former owner said, get to the construction site, open the glove box, smack the maps, pushed the switch in, and the LAMP CORD was taped to the main wiring harness, to the distributor, where they had drilled a hole in the bottom of the distributor housing, one side went to the external lead for power from coil, other went to points/condensor. You could not even hot wire it and make it go.
FIRST thing I removed.
Imagine20 feet of extra resistance from coil to points, plus a switch and CRIMP connectors.