Holley 4 barrel carburetor problem

With time the carburators warp yust enough to let air be sucked in bewen the gaskets and throw off the mixture ratio, when I used to rebuild the carbs I would take a pane of window glass and place very fine emery cloth soaked in ATF and grind the the parts until there where no high spots, a few strokes is all it takes if you need more then the carb is junk, the other thing that I found will distort the carbs are over tigntening the covers for the air filters.

navegator