Frequently Asked Questions

Short answer: Beyond the 4-bbl and hotter cam, the Sprint package added: a higher-compression cylinder head, a larger harmonic balancer, low-restriction dual exhaust with a split (dual-outlet) manifold, dual valve springs, a different distributor, different engine bearings, and a few other items. You can add any of these individually to suit your budget.

Any proposed updates, changes, pictures, and/or corrections, please use our comment section below (may need to click on permalink to access comments feature). Information is subject to change and offered as is without any warranties or guarantees. Please review our Term's Of Use for more information.

Short answer: The Sprint package was essentially the engine, so many builders create the car the way they want. The mechanical Sprint pieces: a higher-compression head, the 4-bbl Quadrajet, dual valve springs, the hotter cam, and the dual-outlet exhaust manifold feeding a Y-pipe. Outside, only the rocker-panel emblems differ (all OHC-6 birds wore the “4.1 Litre Overhead Cam” emblems).

Note: many enthusiasts view the Sprint as a balanced ride/handling/performance package, not just an engine option (it inspired Herb Adams’ “PFST” tuner Firebird). Done tastefully, a Sprint conversion adds value — save your original take-off parts.

Any proposed updates, changes, pictures, and/or corrections, please use our comment section below (may need to click on permalink to access comments feature). Information is subject to change and offered as is without any warranties or guarantees. Please review our Term's Of Use for more information.

Short answer: The short air-cooled coil is correct for the 1968–69 OHC-6. (1966–67 Sprints used a conventional oil-filled coil — with the TI transistor ignition in 1966 and CD capacitive-discharge ignition in 1967.) There’s no off-the-shelf replacement that matches the original air-cooled coil.

Any proposed updates, changes, pictures, and/or corrections, please use our comment section below (may need to click on permalink to access comments feature). Information is subject to change and offered as is without any warranties or guarantees. Please review our Term's Of Use for more information.

Short answer: A real 1968 Sprint has single exhaust but a dual-outlet exhaust manifold (a Y-pipe joins the two outlets into one header pipe), so single exhaust is correct. Confirm it by engine code ZD with a VIN matching the car — that’s the correct Sprint block. Most other Sprint parts could be added to a base 1-bbl car, so verify the block and get PHS documentation.

Any proposed updates, changes, pictures, and/or corrections, please use our comment section below (may need to click on permalink to access comments feature). Information is subject to change and offered as is without any warranties or guarantees. Please review our Term's Of Use for more information.

Short answer: Yes, the Sprint (the OHC-6 4-barrel) is genuinely rare and worth more — only 7,459 Sprints (including Tempest) were built, with about 1,850 having the 2-speed automatic. It’s considered in the same cherished class as the Ram Air cars.

Any proposed updates, changes, pictures, and/or corrections, please use our comment section below (may need to click on permalink to access comments feature). Information is subject to change and offered as is without any warranties or guarantees. Please review our Term's Of Use for more information.

Short answer: A 1968 Sprint (OHC-6) uses a single-core radiator — look for a metal tag reading “ZA” (the HD-cooling unit is “UF”). A 3-core from a 350 V8 fits the same location (the finger guard may not), and OHC-6s don’t use a fan shroud. Persistent overheating usually means a clogged or poor-condition radiator.

Any proposed updates, changes, pictures, and/or corrections, please use our comment section below (may need to click on permalink to access comments feature). Information is subject to change and offered as is without any warranties or guarantees. Please review our Term's Of Use for more information.