I found these 3000GT/Dodge Stealth DOHC Serpentine belt diagrams on the link below... http://www.stealth316.com/2-ac-compressor.htm
If you are re-using the drive belt, be sure to install it in the same
orientation as it had before removal (same side facing the wheel well).
Insert the belt from above. Turn it "sideways" to fit it in between the
alternator pulley and the AC pipe. Correctly tension the drive belt
using its tensioner pulley. Before installing the plastic covers and
wheel, temporarily install the IC pipes and battery negative cable and
start the engine to check the belt operation. If the belt squeals it is
either misaligned or too loose. I found that my old belt squealed when
installed "backwards" from how it was removed. It did not squeal when
installed in the same orientation. If you have messed with both drive
belts, spray a little
water on one belt at a time to see which
is squealing. A misalligned belt will stop squealing for a very short
time after water is sprayed on it, but the squealing quickly comes back
louder than before. If the belt is loose, the squealing will
immediately get louder. Also note that there is just a little play in
how the alternator bolts in. If misalignment is a problem, loosen all
four bracket mounting bolts (this may require again removing an IC
pipe), reposition the alternator, and tighten the bolts to see if this
helps. Do not tighten the belt too much because this can lead to shaft
bearing failure over time.
Here are some links concerning drive belt adjustment.