I hav not researched.... but I suspect an error in pin length.
I'm sure they are not hard to find and that same as the Chevy.

Buy the Chevy kit of the proper diameter and compare to your actual kingpins, I think you'll have a match. (Wouldn't hurt to check about returning if needed, my NAPA has no problems returning the wrong part if that's what it takes to find out for sure or find the right one.)


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-