Reviving from the dead, but I just had a level kit put in from a local dealer who actually just machines metal spaces for the front.
After driving out of the neighboring mechanic shop I could tell it rode horrible, so called them up an asked if the magnetic suspension was touched and they didn't realize this truck had it.
So, I brought it back two days later, had them reset the magneride sensors and calibrate them to the position they are when it's not under load - to which I was told "It took me a couple minutes, so if you ever need them done again, swing in an I'll handle them quick." So easy solution.
Took it for a spin all seems great again.
It does seem a little more rough from factory height, but still a pleasant ride.
I didn't end up using spacers or brackets, but may come to regret it if I ever get to sensitive to the ride.
My theory is that, although the sensor was re-calibrated, the angle of the arm changes the the speed at which the sensor reacts - probably ever so slightly that I couldn't tell. Probably a mind game.
Anyways, just putting my 10 cents in.