Sorry, I read one thing and was thinking another.

 

I had to reposition one rear coil, it was 90 degrees turned (I think I installed it wrong, pain in the butt, had to remove the lower shock bolt, electrical retainers and brake line bracket to get enough droop to turn it-barely), plenty of clearance and no problems since.
I'm probably 1/2 to 3/4 degree high on the rear pinion and it is smooooth, cruising, speeding up, or slowing down. Much better than the stock shaft which may have been poorly balanced or had a bad flange.

Checking the front caster is a bit tedious, you have to make sure the angle finder is properly positioned. Turning it a little bit left or right causes the readings to be off.
Verify your positioning with the numbers they gave you and go from there.