New Lemforder-brand ball joint, suitable for all bay window buses 68-79. In our experience, these are the best on the market. Fits Left & Right, Upper & Lower. Sold individually.
Don't want to deal with pressing new ball joints in? Worry about tearing a boot during install? Why not buy a set of refurbished set of torsion arms with new ball joints already pressed in? Just install, and then drive to the alignment shop. You can find them here.