I'm not 100% certain of this, but I heard that Edelbrock is discontinuing their Q-jet. There was supposedly some licence issue, or something something to do with dwindling demand vs. retooling costs. I would say that a Q-jet is a pretty versatile carb, relatively simple, potentially economical but tricky to fine tune unless you get an expert who really understands them. Forgive my ignorance, but does the 394 carb mounting fit a spread bore carb? If so, then I would hazard a guess the the Q-jet is a good choice. It is worth the effort to find an expert to dial everything in on it, as fuel economy and performance depend on things happening under the right throttle settings (if that makes sence). There's my 2 cents worth.