On my 41 1/2 ton , I have radial tires , all the spring shakle bushings are new , and new king pins. It still has a litle looseness to it , I resently heard that if you run radials on those old staight axles , you had to increase, the " caster or camber" ,I cant remember witch is witch, tilt the king pin back a litle more , to make it work right with the radials. If anybody knows about this , please confirm or denie the corectness of this info for me. Thanks