Lower ball joint removal 64 dart gt convert

I am helping my father in law rebuild his front suspension on his 64 Dart GT convertible.
I am needing info on how to get the lower ball joint assembly removed from the drum brakes. I have used my dewalt impact to try to bust them lose. No joy.
The rest has came apart with no issues.
It's a California rust free car.
Your "info" request is a little vague. A better description of the situation might generate a better response.