what did you figure out with this?while looking at the FPR i had an question pop up that search only made more of a muddy question to figure out. When moving from an NA motor to Boost motor......... is there anything special slash different needed when connection the vacuum line to the FPR?....... i am wondering going from a vacuum filled intake manifold in NA mode to now running Boost does the FPR function properly? it seems vortex has conflicting info about this subject so i am asking this for a straight answer from someone who has first hand dealt with the ins and outs of swapping from NA to Boost. the vortec charger came to me used in a box, no info about install so i have no solid info on how it should be installed outside of the small amount of info the web was able to help me figure out. i have the FPR hooked to a vacuum port on the intake manifold, no check valve or anything but simply running a hose from the manifold to the FPR. now rather than seeing increased vacuum under motor load the FPR is seeing Boost...... should the FPR be connected before the charger so it sees only vacuum?