Quick fuel carb fuel pressure too high? Rich idle...

I am sure it was working perfectly went it came off his car....but a used carb...I would take the bowls off...clean everything and check to see what jets and power valve is in the carb....and probably put new metering block and bowl gaskets in it....

also....what part of the country did it come from.....change in elevations?
Came from Wisconsin, so likely similar elevation. I checked the bowls when I got it, looked clean, primaries are 76 jets, secondaries are 78 jets. 6.5 power valve. Stock jetting specs are 74 primary and 80 secondary with 6.5 power valve so it’s very close to stock jets.