With the main work done under the car, we turned our attention to what needed to be done underhood. In addition to drums, our El Camino also had manual brakes—not a great combination at all. The stock master was ditched, and in its place we installed an 11-inch power brake booster and master cylinder combination. Like the front spindles this came fully assembled from CPP and included all the brake lines to plumb in the proper proportioning valve. The larger booster was a tight fit but it cleared the big-block valve covers, inner fender, and windshield wiper motor.