Is my Vacuum too low?

[nm9stheham]

The FBO plate is easy-peasy and flexible.

 

[fishmens67]

The FBO plate is easy-peasy and flexible.

I put down the welder when this invention came along, best 20 bucks I've ever spent.

 

[Kendog 170]

Here's the limiter plate link.
How to limit mechanical advance in a mopar distributor, tuning for street, strip or all out racing, cure that rich stinky idle, win races