I think I remember mine being set to somewhere between 5-7 degrees down angle using the angle shims below the spring perches? I have misplaced my MP chassis manual so I am not sure what I should set it at. I have read a few places a race car with SS springs can be as much as 7-8 degrees down where as a street car with stock springs might be set at 2-4 degrees. When a went to GM school (to become Mr. Goodwrench!) I remember them telling us it should 0-2 degrees on a chevy.