Spinneyhill your king pins appear to be very similar to my 29 Chrysler.Very complicated way to remove the cotter pin , normally a hammer and punch will shift them.My thrust bearings are the same, they cleaned up and feel good so will be re used, I bought bronze bushes from the local bearing suppliers, drilled the hole and used the die grinder to make a small spiral groove for the grease. Intending to make my own king pins, can source some 7/8 chromed medium tensile shaft, but not sure if this is suitable, what do you think?