With only 14 degrees of timing in your distributor you do not need to run manifold vacuum. Run it on the timed port, and bump it to 34-38 degrees total.

The starter shouldn't be kicking back at 14 initial. I'd suspect an slipped/incorrect balancer/timing mark. What kind of distributor is this?

Manifold vacuum is an easy fix to clean up the idle on a car with a lot of mechanical advance in the dizzy (i.e. stock). If you can get it to the 34-38 total and 20-24 initial that it should have you should probably not run manifold vacuum as it will be too much. At only 14 degrees initial I would probably run manifold vacuum though.

A friend of mine put the eddy 800 on his Dart years ago with a 440, 509 cam, single plane intake and headers. Hes never adjusted anything other than idle and mixture screws and said the car had never been that fast or had such insane response. While I'm not a fan of Eddys and prefer Holleys I do respect this particular friend's opinion. He ran 800 and 850 DPs prior. I've been in the car and its an easy mid to high 11 second car. And the throttle response is indeed awesome.