Ball Joints On My 73 Dart

I'll tell you what, I have not spent this much time in parking lots chatting with folks I have never met prior to purchasing my old Dart! After another "nickel tour" of my old car this afternoon, the gentleman mentioned that one of the few faults with the Dodge Darts of this era was the ball joints were weak. Now I have driven this car about 800 miles and find nothing odd about how it handles or rides. Is there anything I should be looking for that might indicate the ball joints may need replaced? Thanks in advance!

Mike