I dunno man...is the GP a gt or not? I think the GP would walk you(me too)
EDIT: If your going to race on a "track" make sure you gut your car, back seat, system, spare tire and anything you can shave to get less weight. Also make sure your gas tank is almost empty...between a full tank and 1 gal there is I believe a 70lb difference (dont quote me). Thats a lot of extra weight...just my

1998.5 SVT contour #5979 3L 1995 Mercury Mystique 2.5L auto, all ghetto fo sho