Ported or manifold Vacuum to Dist.

Okay, I've always used ported vacuum to dizzy on all my Mopars. I want to go through my Dizzy on my 340 /4 spd. After boring 20 over , basically stock with the exception of Eddy heads. Then recheck my RB 500 with A/T next year. I was reading this in (How to Article) and there saying to run from manifold to Dizzy ? I know it would take a lot of re-curving , weights,canister,Timing ect. I just want to know the opinions of this. I guess I'm old school but I value my knowledgeable friend here on FAB. My Ragtop 340 in particular needs a better fine tuning for sure and I want to do this myself. They claim idling it will run cooler which could help my RB 500 in traffic. I'd like to use my canisters on both for better mileage when cruising. Here's the article.
Everything you wanted to know about ignition advance

That is a question like what kind of oil is best.
Most racers use manifold vacuum. (if advance is not locked out)
The BIG difference mechanically is that with manifold vacuum the advance is "All In" at idle and drops back the advance as more throttle is given.
With ported vacuum full advance comes in as the throttle is opened and drops back as more throttle is given.