If you haven't already....remove the inner plastic wheel well on the passenger side. Theres a unit in there where all those colorful plastic vacuum lines go to....unplug it and take it out. After removing that and whatever lines are connected to it you should have a good idea of what you actually need. (I don't like having emissions crap inside my fender that i'm not using)
What you do need for vacuum is= heater controls (black line threw firewall), Brakes vacuum, Evap. hose (comes threw where the fuel lines do), Fuel pressure regulator, Cruise control if you still have or use it (if you want to remove it then look in the drivers side fender.), EGR valve.
I ran out of fittings on my trickflow box intake so for the egr & brake vacuum i connected a brass barbed t-fitting. T fittings are ok.....just don't use plastic ones....especially on the evap. or brake vac. (used a plastic fitting for my brakes/ egr at first and it cracked from stress and heat....my brakes went to the floor) luckily in my driveway.