I searched but couldn't find much. I want to verify that I have the right bulbs installed for the turn signals and I also want to see if I can find the headlight bulbs (both high and low beam) locally. This is for my '61 Chevy. Are all of the turn signal bulbs supposed to be 1157s (front and rear)? Does anyone have a current part number/manufacturer for the high and low beam headlights?
Phillips and Sylvania provide dual filament, high & low beam head lamps for the '60-'66 Chevy trucks. I see T3 lamps on eBay all the time, so you may check there.
They all require 1157 bulbs even though they only use one filament. The 1156 are one filament but won't fit because the pins are not offset on the side of the lamp.