That was an SSBC kit, SSBC is out of business and was bought out so it's likely the new company providing the parts. It basically uses the KH calipers and other KH parts for a Mustang with a few items converted for use on Mopars.
It's not a bad kit at all, it ends up being almost the same as the original SBP KH disks that these cars had originally. But given the history I would be a little concerned about the future availability of rotors and a couple of the other conversion specific parts. Most of the stuff in that kit is just Mustang KH stuff, which is good. But a couple of parts require machining as part of the conversion, so if the new company goes under you might have to figure out what they did as part of the conversion of the mustang parts to replace stuff later.
