Leaking Venturi Boosters / Edelbrock Performer 1404

Found the "Flapper Valve" and it opens & closes freely when you move the weight! Also put in a Stant 180* T-Stat & drilled two 1/8" holes in it to get my coolant flowing again today. Did notice a slight dribble of fuel out of the passenger primary booster again but I have a smooth idle at 750rpm. Guess I will have to try some fine tuning with the idle mixture screws & the vacuum ports on the carb...

Might also try changing the metering rod springs as I am running 15hg on the vacuum advance port.