Upper ball joint help

I had the same issue a few months ago with my 67. Here is the thread.
http://www.forabodiesonly.com/mopar/showthread.php?t=191112

From the looks it seems that your upper control arms might be fine, you just need to buy a new ball joint, screw it into the UCA and tack weld it so it doesn't pop out again.

My upper control arm was damaged beyond repair and since these are considered to be non wear items they can be hard to come by.

I bought a set of upper control arms from badart, (a member here) and he makes some really nice pieces. They are super strong and have extra positive caster built in so it will increase the cars handling. I needed to make some small modifications to the UCA mounts to make them fit but they work great.