Help with upper ball joint stuck in kuckle...

They make a separator that is like a turn buckle right hand threads on one side left hand threads on the other and it goes on top of the lower ball joint and pushes on the upper stud when you turn the center, Do not heat front end parts ever! This has a recess on both ends that go over the studs so it wont slip off, just start turning and it will pop right out.

Kent-Moore-J-33436-Corvette-Ball-Joint-Separator-Remover.jpg