I was checking out the locations of the lug wrench and jack in my 89 and was glad I did. Not surprisingly - it was as Radar's Vette - the wrench behind the driver's seat and the jack in a black plastic bag, clipped to the top of the spare.
Word to the wise.... check the air pressure in your spare tire now and then. I had a whopping 10 pounds PSI in mine. It is now re-pumped and ready for the unthinkable.