all you have to do is tap it off the same T with the BOV. you'll need a 4-way T. right now, you have a 3 way T for the BOV. the BOV should be tapped off on the fuel pressure regulator vacuum tube.....or, you can also tap it off the cruise control vacuum tube. the autometer plastic tubing will be sufficient for now. get a coppe tubing later on from a harware store.....look at my website:
www.thermal99.20m.com under "modifications1". i have a picture of the BOV 4-way T to go with the boost gauge. peace!