disc brake setups...front/rear

DoctorDiff 13″ front disc brake kit includes loaded Cobra calipers, billet aluminum caliper brackets, rotors, hubs, bearings, seals, dust caps, stainless flex lines and hardware. All new parts $800



DoctorDiff 10.7″ rear disc brake kit includes loaded Cobra calipers with internal parking brake, billet aluminum caliper brackets, rotors, stainless flex lines and hardware. All new parts $625

Anyone here using this exact setup??