Thanks sg...i may just need a different fork...and a bigger hammer...
Where the end goes through the arm smack the large boss with a hammer a few times
I've seen pickle forks bits made to fit in an air hammer that I have often thought would work much better than the hand-held, beat with a big hammer style, but I have yet to resort to needing it or buying one. However, if you have an air hammer, that would be what I'd try on a stubborn ball joint like that. I'm a big fan of air hammers and air tools in general to make work go easier, faster and smoother.