Quote Originally Posted by terrytcl View Post
Steve, so the threaded hole in the adapter was the main cause of the crack? or because your bolt was too long?
The hole that is circled (see the picture above) is an unused position. It's not really necessary and the 70mm bolt length wasn't readily available. The problem was a 75mm bolt was put into that position by mistake and caused the damage to the block when tightened.