A feature from that era that will drive you mad is the seat belt interlock. I don't think there is a single one left that is original with them being so easy to wire around.

I would have never thought to look for a NSS on a manual transmission.

On Chevy trucks from the early 50s the starter button was on the floor. And if you hit it the started engaged and if you were in gear you could creep the car or truck along at about ten mpg.

Think of it as an early example of an EV.