Electric pumps are like giving a brain tumor patient an aspirin for his headache- - - -you're treating the symptom, not the disease. Holley carbs are about as simple a piece of equipment as anybody can deal with- - - -they're "one size fits none" unless the carb is factory-designed for a specific engine, like the governor-equipped Holley 4 barrel for the medium-sized Ford trucks, for instance. Holley performance carbs like the 390 CFM 4 barrel MUST be custom tuned for the engine they're installed on. Fortunately, just about any mouth-breather with a set of screwdrivers and a crescent wrench or two can operate on a Holley with a fair amount of success. It's highly unlikely you'll have any more success with an out of the box Weber- - - -you'll just be spending an exponentially larger amount of money for something that also won't work.
Swapping jets and power valves in a Holley is ridiculously simple- - - - -four screws and a crescent wrench or a box end wrench gets you to the main jets and the power valve, and all it takes is a couple of cork gaskets to get back in business. You don't even have to remove the carb from the engine. Round track racers and drag racers have been tinkering with Holleys for the 60 years I can remember, and probably long before that. Of course, a quarter mile needs four turns and a dirt surface before it qualifies as a race track!
Jerry
