Dan pretty much sums it up.
BTW the spoilers were manufactured in Wooster Ohio.
Manymopars..it appears you likely have original 70 Mopar spoiler pedestals on that pictured wing.
You initially said one had aluminum pedestals but your last picture shows not the case.
I've never seen a number on a 70 fin but if you are lucky to have an unmolested 71 wing like this one, they had this number along with vendor number and encased W near the pedestal bracket.