There could be a book written on front ends. I think I have used every combination out there, and believe me it can be the smallest thing that can screw things up. The angle of your cross member should match your caster adjustment. If it doesn't the spring is binding. I personally think mono leaf springs get a bad rap because of this. You can buy pivoting spring perches from the Deuce Factory if you find this is a problem. My 2 cents