I went 12v with a new set of reflectors with halogens. The park light socket is used for blinkers with yellow bulbs. Rear it’s just a matter of rewiring to use dual filament. Look more original than many other alternatives

Larry
Old man᠁Old truck᠁neither one goes very fast. All you need in life is TIME, PATIENCE and MONEY.
If you are missing one component, you'll need an abundance of the others two.