hopefully somebody can chime in I plumbed my windstar as follows: off the barb on the front drivers side teed to my blow off valve, vac gauge, and fpr the two barbs on the back drivers side one goes just to the brake booster and the other goes to the 1/4" line that t's and goes into the firewall for the heater and the barb ontop by where the factory iac was goes to the 3/8" line im guessing for the charcoal cannister