setting carb with vacuum gauge

I don't know why not, as long as it is full manifold vacuum. You do not want to use the timed port (for dizzy vacuum advance) as long as you get full manifold vacuum it should be fine.

I just re-tuned mine today.

You are talking about the port on the back of that Eddy?

Yep, same carb you sold me n Pops. I just chkd the Eddy manual and it states to adjust with screws, but I would rather use the gauge.

So simply adjust each idle mix screws until max vac is reached without increasing idle rpm right?