LUK was the OEM kit in my '86, but I got a deal on a 12" Valeo at $152.xx (I've used their kits in everything from my '91 Toyota p/u to my dad's '96 powerstroke) and it seems to be doing well; doesn't chatter, no odd noises, the parts seem to be of quality materials, and they hold up to some pretty serious abuse before they give out (took my F150 out mudding, didn't use low much and by the end of the day I had slippage)...
Only been in about two weeks now, but the one in my dad's PSD has been going great for three+ years now...