Josh,

I have never seen the jack but here is a poor photo of one that was described as being from a 54/55st. jack and jack-handle/bendable-rod
Another jack/handle photo

The 1954 Restoration Pack, Specifications Manual show that the Tire Changing Iron only came with RPO273 (15" wheels/tires) on a 3100 and came as standard equipment on all other models. It does not state what the non-15"-wheel 3100s used for a tire changing iron?

Tim