* 2.73: This was a more common ratio for better fuel economy.
* 3.08: A compromise between fuel economy and acceleration.
* 3.36: This was geared more for acceleration, but would impact fuel economy.
* 3.55: Geared for stronger acceleration, but at the cost of fuel economy.
To know the exact ratio in a specific 1971 Nova, you'd need to check the vehicle's original documentation (like the build sheet if it exists) or inspect the differential itself (which requires removing it from the car). The ratio is usually stamped on a tag on the differential housing.
