Headlight Switch Schematic

Well maybe you are not. But if you are actually "blowing switches" it is likely one of two or three causes. One might be that the terminals in the harness connector are failing and loose. This will cause poor connections which will cause heating, and transfer that heat into the switch. Eventually this will fail the switch.

Another might be a short or partial short in the headlights circuit.

Or it might be that it's not the switch at all.

Headlights are quite simple. You have two power sources to the switch and it is in reality, 3 separate switches, or maybe 4 depending on how you look at this, in "one box"

One power source powers ONLY the headlights. that part of the switch is completely separate from the tail/ park and dash lights That is "B1", feeds through the switch, off to the dimmer switch, and then out through the bulkhead connector via the hi and lo beam wires to the lamps

The second comes from the tail fuse and powers the tail/ park and dash lamps. The park lights wire got moved in later years from the park lights terminal of the switch to the tail lights terminal, so the park lights stay on with the tail lights at all times, unlike my 67 where the park lights are only on "in park."

This same power source poweres the dash light dimmer, and that "dimmed" pwer goes out of the siwtch to the fuse panel, to the "INST" fuse, and then on to all the dash lamps.

Simple. Break it down into what it does, find out what works/ does not work, and troubleshoot it.