Demon's new 2bbl carb is 205cfm, takes holley/demon jets and float bowls, has a 3-bolt (stromberg) bolt pattern. You would be able to take advantage of holley 4 barrel knowledge to do the manifold referenced power valve mods and any adjustments to pvrc sizing to fix fuel curves etc. Isn't there a multiple rochester faq in the tech tips?

"The first rule of overkill: You can never have too much overkill."
"Overkill is underrated."