Some 3000gts have an extruding spare tire in the trunk, There is a hump built into the floor board, and some don't and have a flat floor board. Does any one know which models have this and which ones don't? I know this is an odd questions but if any one has any idea it would really help me. Thanks

 

Im not sure about other gts,but mine has the hump in the rear compartment,it takes the "space saver" 16 inch spare.A full size spare will kinda fit,but youll loose any remaining room back there....My only experience here is with mine,and I have no idea of any other configurations....may well be,but its doubtful...