MOOG all the way. I used them on my 81. To move them you have to grab them with all your might and force them around.
I just did them on a 99 V6 with 75K. The OEM Ford ones I put in were just as loose as the 75K 9 year old ones I took out. Which means that there was nothing wrong with the used ones, but the lady wanted new ones and she supplied them.
I haven't driven my car yet, but I am willing to get the MOOG balljoints will make the car drive and handle better than the OEM Ford ones, let alone some cheap off brand.