Upgrade your '67-'70 Chevy pickup to disc brakes and gain the advantage of a more common 5 on 4 3/4" GM midsize passenger car bolt circle, Requires wheel change, Kit includes 11" rotors, GM Midsize calipers, caliper brackets, bearings, seals, spindle nuts, dust caps, banjo bolts, brake hoses, As well as a 11" single diaphragm brake booster, master cylinder, disc/drum proportioning valve and mounting hardware, Only for 1/2 ton trucks.