Mentors - I recently purchased a kingpin replacement kit for my 51 AD from one of the major classic truck parts suppliers. Inspecting the "new" king pin thrust bearings, the single row ball bearings enclosed in a dust shield, I found them hard to turn/spin ... a gritty feel almost like they had serious dirt in them.... can this be normal for this type of bearing or should I return. Other parts seem fine but now I'm not sure about the bearings - Bug
