[Half-Inch Stud]

Real Sealed Beams have ZERO corrosion or reflector aging; they are sealed. Corrosion is a sigh of a phoney foam seal lens on a reflector with a mini bulb inside. I toss those in the creek.

I will repeat; the real Sealed Beams bulbs; T-3, Sylvania, General Electric, and Westinghouse are rather bright with 14.4 Volts.

Mandatory to run a good pair of ground wires from bulb connections on back to the alternator case. Aiming the bulbs will seal the deal.

Corollary: buying brite bulbs and running stock headlamp grounding to the radiator support is a kind of stoopid to me, so don'ta bother defending the stock approach; was cheap-bad when done originally new. Is what Rad-Support rust was made of.

For the Eval record; have tried John Deere clear beams (as bright), and Aircraft Landing lights ( like laser beams, the brightest, even with today's bulbs). Technology has rolled by, and there are brite bulbs to buy, but i don't know what they are. Dang, i've had comments that my headlight are so bright; and so i gotta esplain.

The only bulbs less bright were the phoney seal beams. And i do suppose there are dim sealed Beam bulbs but not familiar as they are usually tossed or burnt before i ever got to em.

[Schurkey]

Instructions for adding relays (home-brew, not a "kit") on my '88 K1500, hosted on another forum. Totally reversible if desired.
http://www.automotiveforums.com/vbul....php?t=1152614

Originally Posted by Half-Inch Stud

Real Sealed Beams have ZERO corrosion or reflector aging; they are sealed.

You'd think so. Not actually true.

Plenty of sealed-beams get cloudy reflectors due to Thermionic Emission--the filament that glows white-hot, also throws off tungsten metal particles just like the active elements inside a hot vacuum tube--triodes, pentodes, etc.

The cloud of metal vapor deposits unevenly onto the reflector and reduces the reflectivity over time.

Many "sealed beam" headlights get bulls-eye cracks just like windshields from road debris. That allows water-vapor to get inside. I've seen one "sealed-beam" headlight with liquid water inside, and it still lit up. Vehicle owner wouldn't pay to replace it.

Attached a photo of a Wagner sealed-beam "Halogen" headlight where the reflector is so pitted that all the light you see on the reflector is coming from the filament inside, not the camera flash.

[Singleton]

I have these LEDs with Daytime Running Lights.
The DRL bar matches well with the horizontal rib of the 64 grille I think. Not sure how they would look in a 65-67 stacked headlight system.
$120 for the set. Modified the wiring harness so that all four low beams are on and also when in high. (These headlights are all low/high beam, no separate low/high).