Yes vacuum should 19 to 21 at idle

There is a great online tool for diagnosing problems with a vacuum gauge

I have the link on my other computer I will send it to you

A kind soul sent on this site sent it to me when I was having there issues


Rich


1953 3/4-Ton Chevy

In the Stovebolt Gallery
More pix

If it can be built ... It can be fixed.

RB53