What is a 1979 Chevy Nova rear axle ratio?

There's no single answer to what the rear axle ratio was in a 1979 Chevy Nova. The ratio varied depending on the engine, transmission, and options chosen by the buyer. A Nova could have had a range of ratios, typically from around 2.73 to 3.73, and possibly higher in some performance-oriented models. To know the specific ratio of a particular 1979 Chevy Nova, you'd need to check the vehicle's build sheet (if available) or look at the axle itself (the ratio is usually stamped on the differential housing).