My engine is too small to run that rich a main jetting. Maybe I could fit that valve inside the hose that supplies my vacuum signal. I was planning to stick the wideband A/F meter on it again, and lean my baseline right out. Then increase the size of the powervalve restrictor orifices, to get a suitably enriched mixture for wide open throttle conditions.
It's only a 2300, so I don't have the benefit of secondaries for WOT enrichment.