Outer Limits 4x4 Board

I'm hoping you guys may be able to help. What is the weight over the rear axle on GQ wagon? I'm looking at using some stock gq rear springs for the rear of my hlux. How well do the standard springs work on a standard gq?

Could I also get a weight for the front?

What would help better is the spring rate. ie. 180lbs /inch

Bazzle