I have a set of rear shocks that appear to be Mopar but I can't find the part number in any of my reference material. Part number 2225841. From the size, they appear to be for a heavy duty application. There is a 2.75" x 3.5" plate welded to the bottom tube.

Dimensions:

Length - 13.25" compressed/21" extended
Bottom tube diameter - 2.19"

I will attach some pictures. Any help would be appreciated.