Help !! Running super rich.

67Dart273 said

"Blown?" If you mean "blown" as in the diaphragm is ruptured or the gasket is torn, the thing leaks fuel directly out of the fuel bowl and right into the intake.

But you won't (likely!!) find THREE blown power valves in three different carbs!!!

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And as the OP said he tried 2 Holleys and 1 Edelbrock. The Edelbrock doesn't have a power valve to blow out. If fuel dribbles out of those it would probably out of the bowl vents because of a needle/seat/float or float adjustment issue. To @71_dart_swinger , did you by chance change the fuel pump? Excessive fuel pressure will cause a rich run issue. You don't need any more than 5#.