Oh i looked around and see that you have a 1960, so you'll need the relay for the four headlights..Unless you can reuse the OEM one. I never had the OEM relay so don't know anything about that.

Here's the aftermarket relay:

Echlin/NAPA
V07240
AR703

I think it cost about $25?, maybe less, and it comes with easy to follow wiring instructions.

By using this relay or the OEM unit you can have two headlights working on dim and four headlights on bright,,,and with this setup your two dim lights will be operating at low beams when not being used as bright lights, but will switch to their bright light output along with the other two remaining of your four headlight system when you go to brights.

Even though this is available..I had to look pretty hard to find it in that parts places didn't have it crossreferenced to a fridge etc. so when you asked they couldn't help.

I phoned Painless wiring..i think it was..and they told me about it.