I will throw my
Here as well, if your getting an off the shelf carb Holley, Demon, Proform, Quick Fuel, etc. And it doesn't use a billet metering block, pull it out and check that the sizes and locations are correct. More often than not, I have found undersized holes, even the occasional oversized hole, in the emulsion bleeds, and or high speed air, Low speed bleeds, etc. Most carb manufacturers will list the "blue-printed" diameters' for the given orifices. If you have a good wire gauge drill set, and get as close as you can to the factory specs w/o going over. If you've already tuned the carb to the car skip this, however, it does make the fuel curve more consistent, and can be tuned further by knowledgeable persons in a dyno environment. When I was dynoing my 440 we blueprinted the metering blocks emulsion bleeds to factory spec we were getting very rich on high end, and really lean in lower mid range so we upped the jet size, and drilled the lowest emulsion hole .06 larger to compensate. Ended up getting a good AFR in the mid range, and leaned out on top enough to pick up a handful of power.