Again I believe I have these numbers from a 1995 3500HD that had a NV4500 w/Turbo Diesel SWB
King Pin Set (2)"
OEM: 302279
Cross Reference: 350035019
12-108-1171
AC Delco: 45F0185
MOOG: 8627B
Kin Pins diameter listed as: 1.1792, or 1.180 or 1-3/16"
USE REAMER Size I, which is 1-1/16" to 1-3/16"