No hackles up. If you get a good QJ they are easy to get to run well. Ditch the plastic float and get a brass one. Epoxy the two plugs on the bottom of the bowl. Up the primary jets by .003. Put Corvette secondary rods with the small tips on the hangers and tune. They also have a spring loaded secondary air valve, so infinite adjustment, no parts to buy, and no power valve to blow. "Adjust" the air bleed tubes to 1 inch. Rochester Carbs by Doug Roe is very informative if you want to get into QJ carbs. The "Performance =Holley" mentality has always been around. I've run them all, I won't have one, they are not worth the hassles, especially on the street. I don't throw them away though, you can always get money for them.