To answer the question you thought was asked you would have to also know what gasket he's running and what valve cover. The bolt hole is blind so there is a limit to how long the bolt can be and have it still work.

As for you John, it isn't that I am always right, it's more that you are wrong so often.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.