Do you have the machine tools available, and enough experience as a machinist to make the carburetor fit the manifold? An adapter plate is not a good option. The carb to use, if you can find one, is the small bore Rochester 2 barrel used on the 265 and 283 V8's, not the bigger bore 2G series that was used on the 305 engines. As always, "The ABC's of carburetion are- - - -Always Buy Carter!" That was true in the 1950's when Carter made a direct replacement carb for the Rochester B. and it's still true today.
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!