How do you replace the rear seal of a 1976 Chevy pickup transmission?

BLOCK THE WHEELS FOR IT WON'T ROLL OVER YOU AND KILL YOU.

Now take the 4 bolts out of the rear drive shaft U-joint, and remove driveshaft and pull it out of the transmission. Now take a screew driver and pry the seal out of the transmission tail shaft. Then take hammer and tap the new seal back in the trans. then put it all back together. YOUR DONE.