How do you replace the oil pan on a 1974 Chevy Nova?

To replace the oil pan on a 1974 Chevy Nova, first, ensure the vehicle is on a level surface and safely elevate it with jack stands. Drain the engine oil and remove the oil filter, then unbolt the oil pan from the engine block, carefully prying it loose if necessary. Clean the mating surfaces, install a new gasket, and secure the new or cleaned oil pan back in place with bolts. Finally, refill the engine with oil and replace the oil filter before starting the engine to check for leaks.