Lifting Front End For Clearance?

just a longer spring wouldnt do anything. you can set your preload to get it as tall as possible. if you really want it higher, you will have to get longer shocks or longer shafts in the shocks you have now if they are rebuildible

An increase in ride height would negatively affect the handling. The target roll center of your sled is designed at 6 inches below the trail surface. Most sleds of late are lowering the center of gravity and mass inertia by placing heavy components lower in the chassis. If you are boon docking or deep powder operating having more leverage on the bars is a good thing but to a trail runner (corner to corner) flat and low makes the grade.