as dangerous as it seems there is a reason they say 55mph MAXIMUM! and just like a speed LIMIT this doenst mean thats the speed you HAVE to drive it at but rather the highest spped you can still go SAFELY! i for one had a spare on my mustang for over a month and went 130+mph on multiple occasions.. ask Tony.

Put it on the rear on the firebird you have no choice the fornt wheels cant go on the back. but as long as they still have the manufacturers factory wheels/tire combo on the car the spare is engineered to be safe for that vehicle.