B-body front end parts on an A-body??

They sent k772 upper ball joints. Are you telling me those won’t work on my disc brakes? The reason I am rebuilding this is because I’m switching to disc brakes.

My mistake. The 727 auto trans number gets stuck in my head.

K772's are correct for the large B/E/73-76 disk & 10" drum type upper ball joint upper control arms.

Your kit is fine.