Oh, I forgot about one more addition I made to the car recently.
I added an air/fuel ratio gauge. I picked up a single-gauge panel at a swap meet and added a piece of aluminum which I expoxied to the top of the dashboard.
Then I welded a bung to one of the header collectors. One of my usual ugly welding jobs.
I ran out of room on my electrical panel so I made a small one to add to the side which holds the controller for the gauge.