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I have a 2010 F150 with the 5.4 and a Edelbrock eforce supercharger 3" upper pulley. Truck makes 500hp 522tq to the tires but im getting belt slip bad. Boost spikes at 9.5 and drops and holds at 7.3. I have a thumper tensioner already and now looking at doing an 8 rib swap plus over driving the crank pulley so I can go back to a 3.25 or 3.5 upper. Does anybody know if there is a 8 rib factory AC clutch pulley that will fit the trucks compressor? It is different compressor then the Mustangs
