[mark houghton]

Your system and control pressures look fine.
The infamous yellow relay: When they die, your car will not run at all. Period.

And as for the orange booted sensor; that's the sender to your boost gauge. Yes it has a post for a ground connection but not necessary since the body of the sensor where it screws into the manifold provides sufficient ground. I've never had a ground wire connected there.

The rear clip on the distributor cap is a royal PITA. Swear words usually work to pop it off and on.

I'm starting to think, from your symptoms, that you have an ignition problem. As for not wanting to start back up until 45 minutes of cooling down, kind of speaks to a heat soak issue 'maybe' with your CDI. Try putting a bag of ice on top of it when you shut down and see if she'll start back up in a few minutes. Maybe just a long shot diagnostic.