Vacuum advance information and myths

RustyRatRod said
It's a Chevy guy thing. They all think vacuum advance is not needed, when 99.9% of them drive their junk on the street and they need it. Others look what the Chevy guys do and copy it thinkin it's the right thing to do. It's not. I won't get into ported or manifold vacuum, but if you drive your car on the street, the vacuum advance SHOULD be hooked up.
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Well, I wanna hear Ya get into it. What Do you Prefer? Over or under the throttle blades? And here's an odd one the Holly on my 340 appears to be pulling vacuum from the top vacuum port even at idle.... I haven't actually put my gauge on it but I swear I can feel it with my finger