duralast ball joints vs moog

ok i found a local supplier who has dusty old boxes of moog ball joints, upper and lower for my project car. $10 each for the uppers, $55 each for the lowers. the boxes say made in USA on the uppers, the lowers he's not sure about. Those are in his warehouse.

any suggestions on a good quality set of the 70 up C body pitman and idler arms? supposedly this is what chrysler used on the T/A challengers for fast ratio steering. i believe PST has the set for $200 is it good quality?

before i pull the trigger on this one, i was looking at the raybestos professional line brand ball joints. they have a professional grade, and a service grade. the difference in the part numbers is just a letter B at the end of the number on the service grade ones. any difference in the 2 ? i can get these at rock auto. is raybestos professional line made in the states? any quality issues between their service grade and professional grade lines?