I had that S/S carb on the 360 that was in my Dart when i bought it, but the 750 version, not the 830. Ran it at the track, worked well. Swapped it for a trick 950 carb that i had laying around that was on an engine masters entry.
The 950 was just hair more than a tenth better on the same night at the track.
Hope this gives a little perspective.
Car runs whats in my signature