One well-built Qjet is worth more than a truckload of Carter AFB "clones". Edelbrocks in general are sort of a "one size fits none" copy of a Carter, with a bunch of manufacturing shortcuts taken that make them virtually impossible to tune without a flow bench, a pile of replacement parts in various sizes, and a few decades of carburetor building experience. I've only been building carbs and teaching the subject since the late 1960's- - - -and I don't feel qualified to do it.
What's your rear axle ratio? It's possible you're working on the wrong end of the vehicle. A little lower gear ratio to let the engine wind up and get into a better torque range might solve the low end bog, and improve the gas mileage by letting the manifold vacuum stay in the "cruise" area more frequently.
Jerry
