Thanks, all.
I am certainly enjoying reading your responses. Please keep your thoughts coming.

I am not new to electrical wiring. But, I am a little bit in a quandary.

In 1946, things were much simpler. So therefore the obvious battery connection to power an accessory, which were limited in scope, came either directly from the headlight switch, the ammeter or the ignition switch.

Several people have told me that the ignition switch was not constructed in such a manner to facilitate a number of accessories. Doing so, could have a negative effect on the switch contacts. So, currently I have a stock heater and stock radio (both with inline fuses) connected to the switched side of the ignition switch. There are NO accessories on the HOT side of the ignition switch.

The question is…do I ADD the Guide 6002 turn signal switch ((7 wire setup, using brake lights as turn lights in addition to brake lights) to the switched side of the ignition switch OR to another HOT point? The overall goals here are (1) to be safe and to (2) protect the integrity of all the truck’s equipment. The turn signal switch has an inline fuse for the battery connection. It does not have 4 way flasher capabilities, only basic turn signals front and rear.

The entire truck remains 6 volt.