I run H1/H4 conversion lights in my '70 Charger, paired with 35W HID H4 hi/lo bulbs, and 30W LED H1 high beam bulbs. The conversion lamps are bolt-in replacements for sealed beam lights, but you get replaceable bulb capability like modern lights. My conversion lights are Euro-spec, so they have a beam pattern that actually WORKS and puts light where you need it, without being in the eyes of oncoming traffic. And, you can pick the color temperature of HIDs and LEDs when you buy them. I run 4300k H4s, which is a bright daylight white (NOT BLUE), and my highbeams are a 3000k amber.
For those without hideaway lights, these conversion lamps look just like factory sealed beam lights - serrated lenses like the originals - so you can "get away" with them unless you're entered in the most nitpicky judged concours show. Plug and play LEDs; the HIDs come with a ballast, plug right into the factory harness, and the ballast has a ground lead (use a mounting screw) and a hot lead that goes to the battery. Very reasonably invisible in my book, considering I can now actually SEE when I drive at night! The 5" lights are kinda limiting just because of size, but these are absolutely better than stock. My '01 Ram has Sport headlights, also with 35w HID hi/lo and 50w LED hi's, and I can cook deer where they stand with that thing. All these guys with LED light bars on their trucks...I don't need one. The stock housings with upgraded lamps work just fine.