Some classes of stock car racing need large Rochester 2-Jet carbs.

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Carburetor Size and CFM Rochester 2G carburetors came in two basic groups: big and small.

The small 2-Jets were used until the early 70`s, where they last appeared on 307 Chevy engines.

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The 2GC is the automatic choke version with the choke coil mounted on the side of the carburetor.

In early versions (1955 - late 60's) the choke thermostat assembly is attached to the airhorn (top part) of the carburetor.In particular, most launches and debris tends to go to either Low Earth Orbit (LEO), or Geosynchronous Earth Orbit (GEO). It was used at various times in every GM car and truck line, as well as GM-built marine engines and by other manufacturers such as Brockway truck, Checker Motors, Dodge and Plymouth (1971, 318 engine), Kaiser and Jeep (Buick V6), Studebaker and White Motors.A number of books and other references refer to the 2G as the front half of a 4G, or the 4-Jet as two Two-Jets back to back.This is only true in reference to the 1956 Olds 88 carburetor.In many cases, the hot air choke was replaced with an electric choke coil.