Rear trailing arm spring info wanted

[Pinchecharlie]

Good morning! I have a mystery spring set that I am trying to identify. I've searched and have not yet found a spring reference chart or what ever for our trucks springs? I would like to know stock spring heights, un sprung and compressed and the values of the springs? Mine is a lowered spring so I just wanted to reference stock heights and weights so I could determine the best spring to go with because .ine are to low. Hope this is a good explanation? Thanks for any help you can give!