Larry Bear,
What are you having a "hell" of a time getting out, the king pin or the tapered bolt that locks it in? You already did one side OK so
I'm sure you know the lock bolt is tapered and drives out from the threaded end. Is it the king pin that is frozen in the axle eye? These two items can become one and require much coaxing!! Heat the eye all around, wait several minutes and spray with WD-40 (or whatever) then grab a good pnuematic air chisel with a flat nose tool and,
using all your weight try driving the king pin down from the top! This has to work cause there ain't no plan B!! You must visualize the king pin moving in your mind !
Stuart.