I asked John your exact question, and he said the S-T-P was equivalent to upping the caster setting. You could call or write Henderson. They freely share their information and might be able to suggest a shop they trade near you. Yes, it takes a shop that understands Ford E-Series front ends and offset bushings. Some will say they won't use the adjustable bushings because they can work loose under heavy load. Some shops will set the Toe ONLY and call it good. Find one that understands. And be prepared to PAY. Have them do an estimate first if you can. There may be worn parts that you can replace yourself at a savings. John told me they used them (Ingalls 59400 or Specialty 24180) if the parts are clean and the pinch bolt is properly torqued. (I'm having trouble with EDIT - The sentence "John told me..." belongs after "...under heavy load") These are the settings I wrote down in MAY 2013 when I visited with John: Left Camber 0, Right Camber +1/4, Left Caster +5, Right Caster +5.5, Toe 0 to slightly IN (Positive).
