Well that is my concern. Another vac line to the FCC? My experience with boosted cars is to have a pressure source to the fuel reg to account for the delta in boost vs fuel pressures, as the turbo will be working against incoming fuel at the injector. I don't see any need there for that on a NA Car. As far as the vac source to the onboard regulator, that is always the correct way to do it. With an aeromovite adj reg I set the base pressure w/o vacuum (43.5 psi on older cars), then added the vac line and the pressure drops accordingly, maybe 5 psi maybe. The Fitech unit is non-adj and comes already connected so we are good there. Na and Boosted cars are different Cats.
