There's a ton of junk on the market in "LED bulbs". Good ones to fit the bayonet-type sockets in cars through '65 are available but expensive (they're
these in cold white, or
these in warm white). Instead, buy '66-up sockets to accept the wedge-base bulbs. That's
these (sold individually, one "each" at the listed price, even tho the pic shows two—hence why two buyers left upset reviews, thinking one money got them two sockets) and install the good bulbs. That's
this yellow-amber one, top pick for general dashboard illumination, much brighter light without glare that you'd get with the white bulbs. The yellow-amber bulbs work well behind green lenses in turn signal pilot lights, too. Red (high beam, oil pressure) is
this one. Cold white is
this one, and warm white is
this .
