1970 headlight wiring

kicking around hooking up the headlights on my drag only 1970 Duster. Does anyone have a wiring schematic or and suggestions on upgrading it to brighter lower amperage bulbs. I want this hooked up to a simple toggle on off switch. Some of the tracks I race at get pretty dark at night.
I was watching 1/8 mile bracket race at Lancaster Dragway couple months back and the track had a power outage on the return road at night. All the racers were complaining they could not see. I would consider some type of Led for low power draw and brightness.