Brake upgrades for 1967-1972 GMC C1500 C2500 & C3500 "roundbody" trucks are very popular. Adding disc brakes or power brakes really improves the performance. Rear disc brakes, Power brake boosters, master cylinders, drop spindle kits, disc brake conversion kits, disc brake brackets, brake line kits, brake cables and more. There are many applications available for your C1500, C2500 & C3500 trucks. Most front disc brakes kit use Modular spindle technology.