After contacting several local "mechanics" about doing the kingpins on my Chevy K-30 [military] I found that they would rather not do the job.It seems that this job is too hard for them to do..I decided to do the job myself despite the extreme knee problems I have going on..I'm not real impressed with Dana Corps. idea of king pins with spring loaded plastic upper tapered bushings.. Who thought up that fubar ?? Did them both today..Gonna set the toe-in after installing new tie rod ends tomorrow.. If I had a lift I could have done this job in 5 or 6 hours..Maybe these youngsters didn't want to get dirty 'cause it sure wasn't brain surgery..I'm getting a new knee in the late winter/early spring...Anyone have a Dupuy knee ?? Pro's and con's ??I have a great doctor lined up.. I just hope I can still work on trucks and equipment afterward..Now I feel a little better..Thanks