MVK, You are my hero.

I know just the feeling you have, from when I replaced lower ball joints on a 68 camaro. I hammered until my stomach muscles were sore.

This lead me to get a nice four-pound sledge.

I have yet to have a problem splitting ball joints with the four pound and a pickle fork, but I will keep all the above in mind when it comes time to work on the 240 D tank.

When in doubt, get a bigger hammer.