What Bill said. There are only 2 kingpin sizes that need bushings reamed - 0.921" for 3/4 ton thru 1-1/2 ton conventional trucks, and 1.110" for 1-1/2 ton Forward Control (COE), School bus and all 2-ton trucks. This info is from my 1947-1951 Chevy Truck Shop Manual.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.