My 68 400 has had the engine block replaced by the previous owner with a later model block. It now has the 11-bolt water pump/timing cover on it. Does the 8-bolt water pump/timing cover bolt up? If so, do I want the 8-bolt water pump system? Is there a reason this was changed in 69? I would like the engine to at least look correct. I discovered this when I ordered the alt brackets for a 68 and the front one didn't fit right because of the water pump bolt configuration. Thanks, Gary