Upper balljoint collapse HELP!

So took my car out for a short drive and noticed the driverside wheel leans in a lot more than usual, so took the wheel off and here is what I found LOL

Never replaced a UBJ before, are they pressed in or do they screw in? The front end (disc brakes) is of a 74 dart I believe not sure about the UBJ. Any tips on how to replace this?