I've had my hand in behind the speedometer and can find the thumb screw. I wasn't sure if the cable was replaced with the dash pulled forward though. I just need to get enough light under there in order to see.

Thanks for your help.


1956 Chevy 3200, 1/2 Ton, 235 CI
https://photos.app.goo.gl/TQQo1YnFjs3U7xB57