My pictures here:
http://www.grandprixforums.net/f11/gtp-in-corner-of-grille-7156.html
Should always be the Left grill for sure.
Everyones personal preference on its placement from there for our cars. For me, it should not to too high, or too low, but should be about right in the middle, closest to the headlight but not on the very edge of the grill. I put mine a little lower than direct center, Pretty close to how some of the classic GTO's have their grill badges placed.
~F~