Front spring eye is 25.25" from the ground to the center of spring eye, rear spring eye is 23.75" from the ground to the center of the spring eye, center of spring arch is 18" from the ground to the bottom of the spring arch.
This is a 4" superlift spring with 35" BFG's. The actually way to measure a spring though is to flop it upside down with the spring eyes laying on the ground then measure from the ground to the spring pin. I did a quick drawing and this dimension is 7.5"