I have a 99 f150 procharged 2 core intercooler running the 3.4" pulley and getting 10psi on the autometer boost gauge. Anyone know what the 12psi pulley size is? Maybe 3.3" or 3.25" pulley. Called procharger and they dont list psi by application, only pulley size. Also, what efans can you run with a procharger...not much distance between the intake pipes and the radiator. Do you have to add an additional idler pulley with the 12psi pulley and what size belt?