Upgrading to Disc Brakes on 1968
Short answer: For a safety upgrade, the 1969 F-body single-piston front-disc setup is the practical choice (the correct-for-1968 4-piston system is more work than needed; 4-wheel discs are nice but unnecessary). Get the master cylinder, booster, and valves from a 1969 Firebird/Camaro, and the disc spindles from the same car or a 1969–72 A-body (Chevelle, Skylark, GS, LeMans, Tempest, GTO, Cutlass, F-85, 442) — A-body spindles are the same, just bolt your Firebird steering arm onto them.
- Donors: 1969 F-body; 1969–72 A-body; pre-1974 X-body (Nova/Apollo/Omega/Ventura); Grand Prix and 1970–72 Monte Carlo. Try to get the whole system: spindles, brake lines, bracket, master cylinder, and booster with valve.
- Valves: 1969–70 GM disc cars used separate metering, proportioning, and warning-light pieces; from 1971 GM combined them into one “combination valve” on the frame rail. Some 1969 V8/AC cars had an extra rear proportioning valve on the left frame rail under the driver’s seat.
One member’s build: 1969 used parts (calipers as cores, El Camino 1-piece rotors replacing the too-thin 2-piece originals), braided stainless hoses, Performance Friction pads, stainless lines, rebuilt master/booster (replated silver cad — the correct Pontiac finish). Trickier spots: rear axle hard lines needed rebending for the 8.5″ housing; some line fittings didn’t match prop-valve ports (adapters/shop-made line); the 1969 flex-line brackets weren’t a direct bolt-on to the 1968 subframe.
| Item | Cost |
|---|---|
| Used parts (rotors [unusable], calipers [cores], brackets, control arms, hose brackets) | $180.00 |
| Calipers x2 (Bendix rebuilds) | $30.00 |
| Beadblasting | $50.00 |
| Rebuilt master & booster (incl. plating) | $125.00 |
| Stainless brake lines (front, rear, axle) | $239.00 |
| Braided stainless flex lines | $70.00 |
| Front pads (Performance Friction) | $24.00 |
| Front wheel bearings & seals | $30.00 |
| Fabricate new LH hardline | $15.00 |
| Misc. flared-nut adapters | $12.00 |
| 1-piece front rotors (Bendix) | $90.00 |
| Proportioning valve (Master Power) | $125.00 |
| Combined total | $990.00 |
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Content last modified: June 13, 2026 at 10:06 am
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