Tim,
Well I got the new thermal flasher installed. It clicks, but I can only hear it if the truck is off! I will say however that it flashes the signal lights more consistently than the silent solid state one.
I guess I'll have to install a buzzer or clicker if I want to hear it.
Well I poked around some more on the net and I found
This Turn-Alarm! They even have a 6v version to replace the 535 flasher. Might have to get one of these puppies!
OK, found another at Chevy of the 40's
audible flasher Kurt