Well, for starters you have to remove the water pump, and most likely will need a puller to get the crank pulley off.
It's not a simple job, but it can be done. Will take a few hours.
However, what is leaking? It's usually the water pump that fails and causes the opti to fail.
96 T/A, Black/Graphite Leather, T-Tops, 6 speed, 10 speaker Delco/Bose "Monsoon"
Original owner, 217k miles and counting.
Total engine rebuild at 187,020 miles. AIR delete, bored .030 over.
Comp cams Xtreme Energy LT1 266HR-14 street cam and springs.
Custom leather interior at 190k miles. Total repaint 193k Miles