OK, I did not know having a primary PV meant that much jet size. I just assmed that going down that far on the carb I have could create too lean of a condition @ 72. The Secondaries are like in the 80's (maybe 84/86) & it is a blocked PV w/ jet extensions. See again, I have more of a drag carb than a street carb. The question is how to make it run most efficent on low/mid for street & be able to do minor tuning & run decent times on the weekends. It is frustrating when I am still learning too. It would be nice to have a drag car & street car!! God bless, Scooter