truckernix,
The shop manual is something I really want, but don't have yet. I should make a pact with myself not to post anymore until I get one...just for this very reason! Although I DO have a 4400, I recall doing 1/2 tons before and thought we pressed the bushings in. I stand corrected.
Rattletrap,
Do a search using "king pin replacement"..the Royal set is discussed at length.
Stuart.