Look on the intake manifold, I think on the left (drivers side). There is a small brass tube that comes out of the intake manifold. It's on the left (drivers side) on the new intake manifolds and comes out the fron on the earlier versions. It should be capped off already with a rubber cap. Remove the cap and hook up your boost guage line. It will allow you to read both boost and vacuum. That's where I hooked mine up and it works great. Hooking up the line only takes about a minute or two. It's mounting the guage that will take the time. Good Luck!!! VXtreme