In the early 1950s, the Rochester B was an attempt by GM to get away from Carter as the primary source of Chevrolet carburetors. Their goal was cost reduction. It was not intended to be an upgrade. Carter responded by marketing a direct replacement carb and vowed to sell a million of them. It took a few years, but when the 1 millionth carb came off the assembly line, Carter had it gold plated and presented it to the CEO of General Motors. My father's shop was a Carter stocking dealer for many years during the 1950s. The company had a popular slogan back then- - - -"The ABCs of carburetion- - - -Always Buy Carter!" Making a "clone" of a substandard carburetor just adds another level of stupidity to that situation!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!