Between One thousand nine hundred fourty nine and 1956, the triangular tags were imaginary of brass. In 1956, Rochester began using aluminium tags. The aluminium tags were coloured on top, however the colour may keep disappeared due to the appropriateness of carburettor cleaner. Round tags were used from One thousand nine hundred sixty five to One thousand nine hundred sixty seven on Quadrajet carburetors and the tag was placed into an indentation on the bowl endure the throttle arm.
Instructions
1. Double o for triangular aluminium or brass tags, roll stamps on the carburetor bowl or other identifying marks, allying a round tag pressed into the side of the bowl. Sign that Rochester carburetors cannot be identified by casting numbers alone. Triangular
