Fuel pouring out Edelbrock – why?

Working on this new-to-me Edelbrock carb on a 66 Dart with 273. Starts and runs but pours fuel out the rear power brake vacuum port. When I plugged that, it began foaming gas up out of the vent holes outboard of the right metering rod.

Never saw this happen before but I bet someone else has. Sunken float maybe?
FE3762CF-1F07-43BC-9FF5-FD389BBED9C9.jpeg
Author: admin