How do you change a rear end axle seal on a 1969 Chevy Nova?

To change the rear end axle seal on a 1969 Chevy Nova, first, lift the vehicle and secure it on jack stands. Remove the wheel and brake drum, then unbolt the axle retaining plate to access the axle shaft. Carefully pull out the axle shaft, replace the old seal with a new one by tapping it into place with a seal driver, and reassemble by reversing the steps. Ensure everything is torqued to specification and check for leaks after refilling the differential fluid.