* Body style: Even within the 1979 Camaro model year, there were slight differences in wheelbase depending on the body style (coupe, hatchback, etc.).
* Engine and transmission specifics: While you've specified a Muncie 4-speed, different Muncie versions may have slightly different output shaft lengths. The engine's size and type could also slightly influence the optimal driveshaft length.
* Suspension components: Modifications to the suspension, especially ride height, can alter the driveshaft's required length.
* Rear axle ratio: While the rear end size is known, the gear ratio itself will not directly affect driveshaft length.
Therefore, you cannot simply determine a specific driveshaft that fits *all* 1979 Camaros with those specifications. It's not a universal fit.
To find the correct driveshaft:
1. Measure your existing driveshaft: If you still have the original driveshaft, this is the most reliable way. Measure its length carefully (from universal joint to universal joint) and note the yoke sizes.
2. Use a driveshaft shop: This is the best option. Bring your car (or just the rear end and transmission if you have them separated), and a reputable driveshaft shop will measure everything precisely to build a driveshaft that fits your specific configuration. They will take into account the yoke sizes, the angle of the driveshaft, and everything else necessary to create a safe and properly functioning component.
3. Consult a parts catalog: Some parts catalogs (like Summit Racing, Jegs, etc.) allow you to specify your vehicle details, including year, model, transmission, and rear end. This might give you a suggested length, but it's still advisable to double-check this with measurements from your car or a driveshaft shop.
Don't guess! Using an incorrect driveshaft length can cause vibrations, binding, u-joint failure, and potentially damage your transmission or rear end. Proper driveshaft length and angle are crucial for safe and reliable operation.
