I replaced all of the secondary lights with LEDs a couple of years ago with limited success, so it's time to have a go at the headlights.
I ordered a set of Truck-Lite LED 7 inch round headlights. The prices have come down significantly over the last couple of years, but they are still a bit pricy compared to sealed beams. These are advertised for Jeeps mostly, although they do reference "other classic cars". They have a standard plug connection that is compatible with the old sealed beams and they are an easy and direct replacement.
Here are some before and after photos:
|Sealed Beam Headlights|
|Sealed Beam Pattern|