I have been working on my 1977 fj40 with a caster issue It has a 2.5 spring lift, and a 5 inch [center to center bolt] shackle lift running bf Goodrich mud terrain km2 33/10.5xr15 tires The font end is tight center arm is good I have tried 2.5- and 4-degree shims I still can't get the steering...