Probably H4 a 3-wire system or at least is what was in #1855 and #2584.
My recommendation is always Hella 7" conversions with the H4 bulbs of your choice.
I buy from
https://www.rallylights.com/hella-7-...dlamp-kit.html
They have lights with a City Light option.
Bulbs
https://www.rallylights.com/hella-h4...remium-50.html
But you'll probably want to run a direct 12v line and use the factory wiring to trigger a relay.
If I wanted LED I'd run the Morimoto 2-Stroke H4 units.
Jim