Ok you have the one piece main cap. You still have the rail 2.5" lower than the stock block. This is the new style, all the old ones had 4 bolt and 2 cross bolts on 2, 3, and 4.


All the old aluminum blocks had 2.500 mains.


EDIT:

I thought the A8 blocks came with just caps?? Someone must have made that main cap for your block.

The Aluminum race block has the 6 bolt, the A8 has 4 bolt mains and uses a huge cam 2.125 vs the 50mm cam the Aluminum race block uses... It's starting to come back now....