Hy IHBoilermaker, According to my Moog catalog there were three different front axles for a 65 C60 the 5000 lb. the 7000 lb. (FO70), and the 9000 lb. (FO90)
the 5000 lb. axle kingpins are 1.109" diameter and 6.343" long
the 7000 lb. axle kingpins are 1.2494" diameter and 7.890" long
the 9000 lb. axle kingpins are 1.4335" and 1.1860" (tapered pin) and 8.750" long
the Moog p/ns for the different kingpin kits follows
the 5000lb. pins are p/n 8492B
the 7000lb. pins are p/n 8491B
the 9000lb. pins are p/n 8462B
The following are RockAuto prices for the Moog parts
8492B $26.79, 8491B $33.59, 8462B $122.79
The following are Napa crosses to the Moog p/ns and Napa prices
8492B= Napa p/n NCP 2621016 $68.40, 8491B= Napa p/n NCP 2621017 $111.60, 8462B= Napa p/n NCP 2621406 $197.10, hope that helps.