Hard part can be getting the king pins pressed out of the axle, sometimes they're really rusted in tight. Other times they tap out with a rubber mallet...

After that you remove and replace the bushings and have them reamed or honed. Trick there is ensuring they're reamed on the same center line as each other, easily done with a reamer with a floating pilot, or simpler yet by taking them to an automotive machine shop.

•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-