by cjbiagi » Thu Aug 20, 2015 8:52 pm
I am not familiar with the Holley 5200 but I know Quadrajets have a similar problem because there are some plugs on the bottom of the float bowls that leak. They will slowly drain the fuel from the bowls into the intake and are dry on startup. The usual fix is to either replug them and or epoxy them so they don't leak. You may have a issue with the floats as well but I would think a tear down would be best to see what's going on in there. Here is a pic of a 5200 for ID purposes.
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Clyde.........75 Monza 2+2