Oh that was a PITB! Well here it is. Dirty, ugly, etc. I chased every thread. Asided from being filthy, the only thing I can tell wrong is it is missing one of the centering pins, circled in "Yellow Blue". The other pin is circled just in "Blue" as a reference.
Are the two "Red" circled threaded holes stripped? The 3 "White" arrowed holes should not be threaded. They bolt through the cover.
The new price is $750.00!
Anway, here are the pics: