While this post has strayed a bit (Ok, a LOT) I honestly believe that ANY carb in good working order can be adjusted to do pretty much whatever you need it to do. For instance, your claim that you don't know anyone who has a streetable Holley is far too general a statement. What part of the RPM range was the problem in? You as the tuner need to be able to identify the problem area and adjust it accordingly. For instance, is the car lazy or bogging off idle? Then you need to adjust the accel pump parts. The accel pump cam can be adjusted or replaced with one that fits your needs. The accel pump arm linkage can be adjusted for either abit more of a shot, or a bit less. The accel pump housing itself can be replaced with a larger one. Then there are squirter nozzles which have more choices than you can imagine, all to tailor the accel pump quantity and length to do what you need to do. Next is the main jet, again more sizes here than you can swap out in a year of trying. Float height and in some carbs, adjustable air bleeds can all be tuned to do exactly what you want on a Holley, and if that's not enough there are aftermarket parts and all this stuff is available at any decent parts house or from online or phone suppliers like Summit. This is not intended as a judgement, but I get the feeling that you are kind of fumbling with the carb more than you are actually tuning it. I've tuned everything from sand drag quads with nitrous to blown street motors to sport bikes to circle trackers to motocrossers and one thing is for sure, once you understand what the motor is telling you, it's easy. Otherwise your just swapping parts on a poke and a hope. But all this is irrelavent really, because for mild street motors I have never done anything other than bolt the carb on out of the box, set the idle mixture screws and close the hood. Holleys simply haven't needed anything more for excellent street driveablity.
...mah bad
