Factory, it was only ever a 1962 to pre 1972, non emission carb. Examples were
1) some 1962-1965 287 and 327 AMC's,
2) the 1963-1972 IHI/International 345,
3) 1965-1967 427 Shelby Cobra or Total Performance optioned 289/302/390/427/428 Ford,
4) as part of a 'triple duces' 1968-1970 427 Chev,
5) as part of a 1968-1970 Mopar 340 or 440 'six pack',
6) as a standard replacement Holley list for Ford's with the Autolite 2100. Motorcraft 2150, ie 2V 260, 289, 302, 351, 390, 400 from 1962 to 1976.
The term 2300 is something of a misnomer. It started off as a 280 cfm but in triple carb installations, it got the 5 1/8" air horn shaved off an called a 2280. It then ended up as the 2300 series in 350 or 500 or rare 650 cfm. It does have an emissions compliant version, the ultra rare #9117 320 cfm Economizer ( a piece of junk with old style float bowl)