master power kit for 67 barracuda??

I was planning on using MP for my rear brakes but came across someone on Moparts.com that seems to have a good reputation and I like cost and product. His screen name is DoctorDiff, i do have his website if anyone wants it. I havent bought them yet but I am really leaning in that direction now.

10.7” rear disc brake kit includes loaded Cobra calipers, billet aluminum caliper brackets, rotors, stainless flex lines and all hardware $625