The Rochester 2G is a good carb, but find one for a Chevy 265. The Olds carb will run way too lean. Where do you plan to find a 2-BBL intake for the 270? Adapting a 2 BBL to a one-hole manifold is like trying to flush a toilet through a 2" pipe.
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!