What kind of travel can I expect from a leaf spring before I start to damage the spring? I have a sprung over YJ with a 4 cyl motor. The front springs are starting to sag pretty bad. The rear axle keeps trying to move forward under my jeep bending the rear springs about 6" from the eye. I am running 87 Toy pickup springs in the rear(for 5" more wheelbase) and 80-85 toy front springs in the front (had them laying around and they looked more durable than stock YJ springs). I have been running the springs for almost a year now and they have been holding up pretty well, execpt for the problems I listed above. I would ruin a stock spring on every wheeling trip before I swaped in the Toy spings. I have been thinking about getting some custom springs made up. Would a spring pack made up of more leaves that are thinner be less likely to sag because of long travel suspension? Or would less leaves that are thicker be more durable? Keep in mind I would like to keep my suspension travel about the same. I know a longer spring would be better but I don't want to loose and approch or departure angle.