Oh, got another after thought. I remember when Inglese built the Chevy SB Weber manifold. It has a center plenum like this one pictured here. He immediately took it to the dyno and immediately melted the valves on the heads with it. It seems that the plenum caused the engine to suddenly lean out under load and self destructed the engine.
I don't know if that was ever fixed but I do recall that manifold with a bih * next to it stating that it was "for show only".
It looks a lot like this thing here does.
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