Daniel Stern Lighting Consultancy and Supply
The puny stock wiring and switch are barely adequate for the job. Running the power thru relays makes a huge difference and the switch only carries a small amount of current. Most of the factory wiring can be retained, but the power to the headlight would instead activate the relay like a switch. The relay routes full power from the battery to the headlights with better & shorter wires. I mounted the relays for my headlights and electric fans behind the left front headlight. This allowed for short wires from the battery and got them out of the hot engine compartment; also kind of hid them from view.
You dont have to cut your buckets or switch to new style bulbs, although there are better headlight bulbs available... see the chart on Stern's website.
Daniel Stern has a great tech section and products, which I used, but you can get relays anywhere and ceramic connectors are also widely available.