9" chrome air cleaner top ?
The chrome one a factory 273 4bbl HP engine, that’s all they ever came on, 1965-1967 Dodge Dart “Charger 273” and Plymouth “Commando 273” A-body cars. They made 2 versions, one like pictured above, and one with a breather tube for the CAP (California clean air package) version...supposed to have a tin decal on the top also.