Shocks over extending

[Guardm16]

How do you keep this from happening?

shock.jpg

To get the front suspension ride height set right, I had to lower the spring seat on the adjustment sleeve. Now, when I jack the front of the truck up, the shock extends beyond the length of the spring. Do I need limiting straps?

Additionally the 35 truck manual says the front shock extended length should be 15.15 inches. (that was how I determined which shock body to use up front) This is exactly what I have. It also say that the front shocks are 2.5 inches shorter than the Rear shocks, My rear shocks are about 1/2 inch shorter than the front. Should I put the shorter shocks in the front?

shocks diagram.PNG