Holley carburetor issue

[351 82GT]

I helped my friend install a new power valve in his 650 holley. We scraped all the old gaskets off the surfaces, installed the new valve and put it back together. When we started it up, fuel was spraying from the vent tube. It wasn't pouring out but you could see a light mist of fuel coming out.
What would cause this? I told him it was possible that a piece of the old cork gasket got into one of the tiny carb. holes when we were scraping the gasket off, since we did it with the carb on the car.

We tried to be careful when we did it and used a shop vac to suck up the debris every now and then.
What should we do? Take the bowl off again and hit the holes with an air hose to dislodge and debris that might have got in there?

 

[jrichker]

There are three possiblities:
1.) You bumped the float assembly and distrubed the float level settings.
2.) The float assembly is not correctly assembled and the float valve is not shutting fuel off when the float rises.
3.) You have some dirt or gasket material stuck under the float valve. In most cases this means you get to take the top off the carb and remove the float assembly, float valve and blow air through the fuel intake port. Cover the float valve seat with a rag to catch any loose dirt or pieces of the float valve that you didn't get to come out.

 

[93 LX]

float needle and seat....

 

[85_SS_302_Coupe]

float needle and seat....

Exactly. You probably have some gasket/cork material stuck in the needle seat area and the needle isn't seating, so the bowl is over filling. Take it all back off and clean out the metering block (to be safe), and look close at the float needle and seat and make sure they're clean. Put it back together and readjust the float level for good measure.