no, they dont make a throttle body spacer for the 3.0, but the intake kit helped my truck.

Also, do you smell gasoline any where around the truck? about a year ago, i started getting really bad milage, down around where you are sayin. i was only gettin two or three trips back and forth between school when the milage was at its worst, which is only about five or six miles from where i live. after about two weeks of this, i started smelling gas around the truck. i found that it was leaking from a small, mushroom looking thing on the rear of the passenger side fuel rail. that is the fuel pressure vibration dampener. when it goes bad, it leaks fuel. unfortunatly, it leaks directly onto the exhaust crossover pipe on the stock manifolds. if it goes long enough, it runs the risk of causing fire. i hope this helps, just relaying my experiences with crappy milage lol. <img src="/forums/images/graemlins/lol.gif" alt="" />