I don't know of a single LED drop-in for headlights that would improve on the Euro's w/ halogen that you are running now. If you had the US Spec 7" rounds, there are LED or HID headlight assemblies that replace the old sealed beam. Some of those are superior (some are Chinese crapola).

I put some LEDs in for the main gauge illumination of my former w123. Superior in all aspects (and no electrical gremlins).

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1991 300D 2.5 "Rocinante"
2002 Golf TDI "Teen Spirit"
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1984 300D
1966 Mustang I6 3sp
1985 Mazda RX-7 GSLSE
1982 Toyota Supra
1977 Datsun 280z
1971 Datsun 240z