Welcome! That is a beautiful wagon you have there. Do your lower ball joints need replaced? The reason I'm asking is that any new replacement you might find is going to be foreign made, and of inferior quality. If you put some fresh grease in the ball joints and then check for free play, you might be surprised. Chrysler had the most stout front end parts of all the car manufacturers back in the day. When I did PA safety inspections the allowable free play was always a few thousandths more than GM or Ford. You would use a dial indicator to measure and compare your reading with the spec chart. Hope this info helps and keep us posted on your progress.