I have read in some Mustang forums that setting the caster at 2 to 3 degrees positive caster is the best for my 67. They say to do this with stock type pieces one should add about .250 shims behind the front bolt of the upper arms. This compute? I have done the shelby drop mount. I still have the strut rod but are from a 68 to rid the extra joint of the 67s. Might go full adjustable if I have probs getting the settings I need.