Back in the late 50's early 60's I was a parts man at a Chevy dealership.
The cars all had normally on, push button door switches as Tim described.
I installed many 'accessory' under dash lighting kits in my own Chevy's and
for others. Obviously you won't be able to find any of those original accessory
kits today, that would be like striking gold I'm sure.
Brad Allan now doubt has an example of these in his museum, maybe he
can chime in and show us a picture of one. And I'm sure you have accessory
books Tim, that list the under dash kits, no??
But.....if it's just lighting that you're interested in Sharon, there are many under
dash/footwell LED lighting kits on the market now a days for around $15-$20.
All the ones I've seen from a brief tour of the internet, are for late model cars
which already have footwell lighting. So, you would have to get creative and
purchase push button switches such as available on Amazon then find a
good spot to drill a hole.
You seem to understand the electrical part of it, that would simply be running
a hot lead to/thru the switches and and out to the lights and grounding the circuit.
Let us know what you come up with.
Denny Graham
Sandwich, IL
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Denny G
Sandwich, IL