Wheel Wrench Bag

[dagnabbitt]

I am wondering if these spring units that hold the kit in the truck are worth saving, and what year of trucks they were on?

I don't have one on my 68 (or my other trucks either), so were they offered only on certain years, or on certain RPOs?

First two are on a truck at the junkyard, third is a pic of my own truck, which does not even have a provision for it. Thanks!