Brake Calipers too snug (Pirate Jack A body disc brake kit)

You made the same mistake I made and bought the cheap chinese junk from Pirate Jack like I did. I wound up replacing the brake pads, calipers and now the master cylinder. The master cylinder never had a groove machined for a snap ring to hold the piston in the bore and this one worked its way out and started leaking. Anyone thinking about buying one of these kits, do yourself a massive solid and don't buy it! They are junk. The only parts that I haven't had issues with are the spindles and rotors.