The Ecodes are definitely a big improvement. They give a concentrated amount of light, low and forward on the road, with a flat cut-off across the top of the beam to keep the light out of on-coming driver's eyes. Then they have an angular flare, upward, to the right, to illuminate signs and the shoulder of the road. Meanwhile DOT sealed beams just produce a blob of round light, which is why most people seek better/brighter lighting.
Thanks for the link to the harness from Summit. I like the idea of installing that and powering the lights directly.
I've never checked, but are there upgraded lights for the little H4701 and H4703 quad headlights in the 89/90/91 Burbs and Blazers? One of my original lows burned out about a year ago and I needed a replacement ASAP. Installed one from NAPA (in their box). Man, what friggin' joke. I wound up finding a Sylvania to replace it with, but even it isn't as good as the original. I see Sylvania makes them in their Xtravision line. Those might be a fairly decent upgrade.