If a power valve is blown/broken the carb will provide a very rich mixture all the time.
Your plugs will be black.
Black smoke will be emitted from the exhaust.
Use any Holley pump shooter you like with tubes or not, they all shoot at the skirt of the booster venturies, or at least they should. It is a bit acedemic anyway, as long as the pump shot goes down the carb throat there will be plenty of turbulence as it passes the throttle blades and into the manifold to vaporize the fuel.
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