And since I broke my resolve to post in the thread, maybe a little addition information might be interesting.
Sometimes one may glean additional information about a product by looking at other products by the same company. So, a bit of a history lesson.
Rochester built their first carburetor in 1949. It was a series A and a two barrel. As other carburetor manufacturers (Holley, and Stromberg) had a "convention" of using a double series letter to denote a two-barrel. The 1949 Rochester was designated type AA (Oldsmobile). But Oldsmobile also used Carter. The AA was contined by Oldsmobile through 1950, and at the end of 1950 the series AA was thankfully discontinued.
The first series B carb was sold on the 1950 model Chevrolets. But did you know there was a two-barrel model B? Using the above convention, it was designated BB and used one year and one year only by Oldsmobile and Cadillac (1951). Wonder why it was discontinued, and replaced by the series G??? Oh, and both Olds and Caddy also used Carters in 1951.
To date, I have yet to sell my first type BB carburetor! And in 40 plus year of selling kits, have sold about 3 kits for the BB. Wonder why? Yet we sell lots of kits for the 1951 Olds and Caddy Carters.
The series G was produced in both a two-barrel and a 4-barrel. Stromberg had a 4-barrel beginning in 1952 which was called a 4-A (I guess AAAA would have been awkward). Likewise the two-barrel G was a 2G, and the 4-barrel G was the 4G. These continued with the single B (and later the H on the Corvair) until the series M. Since the M had a vacuum break, it was named an MV (1 barrel) a.k.a. monojet, and the 4-barrel was named a 4MV a.k.a. quadrajet.
But note there was NEVER a 4B and the BB two-barrel lasted only a single year.
Jon.
Last edited by carbking; 05/25/2016 11:52 PM.
