Carter/Ball carburetor- Help ID

In general, Holley's are considered superior

{{citation needed}} because no they ain't. There are people who prefer them—just like there are people who prefer Oldsmobiles or Toyotas, just like there are people who prefer chocolate ice cream or strawberry, etc—but there sure as hell ain't no general consensus that the Holley 1920 is superior to the Carter BBS. The 1920 has several engineering/design-level shortcomings compared to the Carter BBS: in addition to the two you mentioned, the side-hung float makes the 1920 prone to stallout on hard left turns. The Carter BBS has its own annoyances and eventual wear-out points, but none of the is anywhere near as serious as those three crap aspects of the 1920.

That said, though, at this late date carb condition is more important. A new 1920 is a better pick than a worn-out BBS. Wait, did someone already say that?