I have a set of Moog stock replacements front ball joints on my 2000 GT. Their construction seams first rate. Compared to stock, they appear beefier. In addition include a method to add grease.
In general, they make a solid product. Much better than the cheap imports.
Note, my experience is with "street" applications.
Hopefully someone can share some more recent and direct experience (and wmburns did while I was typing this ) but Moog is pretty well respected when it comes to replacement suspension components like balljoints and bushings.
I've used them before on other vehicles and had no problems with them.
Motorcraft balljoints were only a few bucks more than the Moogs at Rockauto (looks like they've gone up a few bucks since though) so I went with those instead but I've never heard anything bad about Moog.
I belive you people seem to use Moog ball joints over the Motorcraft
and the OEM Ford ball joints.I will try them out though.My car will be
going to my front end guy next week.If my ball joints are the culprit
they will be replaced with these Moog ball joints.Thanks for the help
everyone.