The 2 bbl Holley will work good with low boost and will start being a cork over 325hp. A 4bbl 500 will be better, not sure about the Edelbrocks for a blow thru setup. Don't know what mods need to be done to them to work.
A small Holley double pumper with mech secondaries in the 500 range would be great, they do not make one. You can get a 600 though.
