Stuck distributor

I would get a long 3/8 drive extension and alternate from side to side tapping it with a LARGE hammer. You're not trying to break it. You want a large hammer so it will give good firm heavy blows, but not so much you're trying to break anything. Keep alternating tapping on it side to side, spraying with a good quality penetrating oil. I like Sea Foam Deep Creep and it'll probably loosen up and come on out.