How to Mount Spare Tire on a 1969 Dart 340 GTS

Got the jack mounted fine, just trying to figure out the spare. With the jack hook under the spare it will rattle, no way Chrysler would have done that from the factory. Anybody know how long the stud is supposed to be on a E70-14 car? Didn't have the original for the car and the one in it is 6 inches long, thinking it's maybe too short? No way the circle is going to reach the stud currently in the car.

Just curious for those that have a 69 Dart - how shallow is your spare well? From the bottom to the floor of the trunk pan.