What is the towing capacity of a 1978 305 Chevy Nova?

There's no single towing capacity for a 1978 Chevy Nova with a 305 engine. The towing capacity depended heavily on the specific model (e.g., hatchback, coupe, etc.), the transmission (automatic or manual), the axle ratio, and the options selected by the original owner. GM didn't publish a single figure for all 305-equipped Novas.

To find a reasonable estimate, you'd need to consult the original owner's manual for that specific vehicle. Even then, the listed capacity may be a conservative estimate. It's extremely dangerous to rely on estimates found online without verifying them with the original documentation.

Furthermore, even with the owner's manual information, a 1978 Nova with a 305 is a relatively small, light car, and its actual towing capacity would be quite low, likely under 1000 lbs, and probably much less if you're considering anything beyond a small trailer. Attempting to tow anything significantly heavier could damage the vehicle's transmission, brakes, suspension, or even cause accidents.