Has anyone swapped a Holley in place of an Edelbrock on a 340?

I ran a Mr. Gasket quick advance timing kit (springs) and set timing at 36 degrees total with the vacuum advance disabled along with a 650 double pumper. Response was instantaneous with no bog but I can't boast about gas mileage. Double pumpers are harder to tune and you need to have the pumps set correctly for a decent shot, but they work.
I would take some of the advice previously given and try to work with the Eddy before dumping a wad of cash on a new Holley, but if you end up there, don't make the typical mistake of over carburetion. It is a 340, not a 440.