hmm. mine doesn’t look like that. it has a ‘v’ band. maybe it’s a GMC/chevy difference? . . .
My GMC oil bath air cleaner has a 'v' band.
It is a 2-barrel AA1 Zenith with externally adjustable main jets. That carburetor is from a (GMC 302) and it is installed on my 1960 261 (060 over-bore).