My truck came lowered & supposedly with dropped spindles & springs. But I have no idea how to tell what was really done.

The springs look new (silver in color?) but not sure how to tell what spindles I have.
Can someone measure the fender lip to center of wheel so I can determine my drop?
It needs to be fender to wheel center as wheel/tire size wont effect this measurement.
I’m assuming a lowered truck will require a different shock than stock ride hight. Is this correct?
s/t