CFM-stock carb size? cant find answer anywhere

The eldebrock carb will not work for the draw through system because of the power valve arrangement. You either have to use a Q-jet or a Holley. The holley can be modified for boosted aplication fairly easily but the eldebrock can't.
 
if i decided to go with a holley, which one would i need to get and what modifications would i need to make?
by the way, thanks for all the info!
 
A spread bore design with vacuum secondaries. PM Warwagon on the mods. I know he's got the links to the mods.
 
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