I'm about to buy a kingpin set for my 55, 2nd series. I also had the axle dropped 3". I was looking at sets at LMC and Carter's and I believe the illustrations on line showed the correct bearings and spacers..not washers..You might want to look them up. You'll also have to flip the tie rods for clearance with the springs..good application for new style rod ends. You probably know that..just thought I'd mention it.
http://www.lmctruck.com/ICATALOG/CA/full.aspx?Page=82Good luck..
Keith
PS in re-thinking this the new ones are probably the same as you're old one. How much are they off by? Can the axle be machined?
