Hey Stingray,you talkin to me? grin I said something earlier on in this thread about my experiences with Rochester B's.Aside from the usual fuel seepage from float bowl covers overtightened in the past by ham fisted tuners,they carburated very well.In fact as good as the Holley Webers I also tried out.
But that's my story on my engine.The best advice is to try them out to see what they do for your engine.
These 235/261'a are low tech designs even by 1950's standards,there no magical carb set ups,just run what works for you.