Install a Vacuum Gauge

Hey Everyone,

One of the best ways (or so I was taught) to watch real time engine performance is to have a vacuum gauge. So I was curious if there is a vacuum line I could tap into (install a T?) to then run a line to install a vacuum gauge.

Any one have the shop/service manual or have a vacuum gauge installed yourself?

I'd love pictures and advice... Thanks!!

I have one im selling, I used a free nipple on the tb, works pretty good, I think I have pics somewhere