What is the reason for wanting to swap carbs? Is yours worn out or damaged in some way? Ditto on Jon's comment about the Rochester 2 BBL- - - -unless you're planning to do some sort of high RPM racing, there's absolutely no reason to change carbs.
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!