does the Rochester 2GV carb need the aluminium ball located in the accel pump hole.
Straight 6 = single barrel rochester. V8=either a rochester 2 barrel, or quadrajet.
Rochester Quadrajet.
11 1/16"
#56 jets
Rochester 2-jet (2gc)
Rochester Quadrajet
There should be an idle setting on the side of the rochester carb.
Yes. There are adapters available for this, however switching to the correct intake manifold is a better solution.
The diagram is in your left sock.
It varies, but most are around 800-850 cfm.
That would most likely come with a Rochester Quadrajet.
Most of the Rochester carbs were factory rated at 750 cfm; but this was a airflow rating only; unlike performance carbs that are flowed with a air and fuel mix. When the factory Rochester carb is wet flowed like a Holley carb, the flow rating of the carb is adjusted to around 470-500cfm. I hope this helps you. Mark