I always thought that I had the origonal spare to my dad's 73 Challenger. I was scrounging through parts today and found it in a stack of wheels. The problem is that it is a Goodyear tire. I thought 73's came with Firestone's.

The tire is a WSW Goodyear Polyglass F70-14. It's in great shape and I will still use it when the car is done but is it the origonal spare tire or not?