Here are some pictures of the original engine from my Buick. The previous owner (20 years old) blew it up. Click the pictures for a better view.

The oil pan, filled with bearings, piston pieces, and part of the connecting rod bolt.

The piston wall where the rod broke the block. The broken cam can be seen just to the left of the connecting rod bolt.

The piston

The crank is shot

The rear of the cam, one of 3 pieces!