Spring rate and preload are different between them. You'll have to measure your ride height before install, then adjust the coilovers to match, after installation.
You can with spring compressors, but yea, it is generally easier when on vehicle. Spray the threads with oil.ya i read it and he did pretty much what i was trying to do but didn't answer my questions exactly. Also I figured out you can't adjust the coilovers when they aren't on the truck the shock shaft just rotates. so ill just figure it out when i install it
Ah, bummer thats a good point. Ok I guess ill change the question, anyone installed Icon CO's to level, or stock height who much thread was showing? That should at least get me close