Vacuum this low normal?

10.5:1 compression. Valves are good. Just checked those last month. Runs good and strong. Does not like being over heated at all, got stuck in traffic last night got to 210 for longer then I wanted and engine started to shake at idle like a dog sh$ting razor blades.

Idle mixture screws are set for the best vacuum possible.

The engine has always shook a lil more then I wanted but when it was overheated I could feel it ...got bad.
Other then that, at runs strong , and smooth.