Holley pouring out gas

66 ddart /6 with the singl bbl Holley 1920. Started up started to hear strang clicks open hood and gas is pouring out the carb . Gas all over the top of carb and all over the engine . Gas was also inside air filter. Checked everything out a few hous later. No visible problems. Cleaned up the gas. Checked squirter it worked. Started up, took a lot of tries to get it started. No leaks. Any ideas what happened? Also it has been very hot here last few days.