I missed the photo opportunity of detailing how the section https://pbase.com/9146gt/image/163624750 of the engine lid was measured and cut-off creating the needed extra cooling area https://pbase.com/image/163624754 used by the mid-engine 914-6 GT.

When removing the extra section of metal from the factory standard 914-6 engine bay lid, the part is significantly weaken and a reinforcement 'lip' is a must around the entire perimeter of the new opening https://pbase.com/9146gt/image/163624756