Does all this really matter??
When Larry Stock of Pantera Parts owned 8MA0510 (#6 built if you count the prototype 8MA0500 that was a pushmobile until the early 2000s), he did some research with Wilkinson and Santiago, and they determined there were only six (6.0) original 1967 Mangustas ever built. There MAY have been one or possibly two built in '66 but no one really knows for sure nearly 50 years past. #0510 had quite a few GT-40 parts visible on it's ZF: aluminum side plates in place of the later cast iron parts, no protective aluminum box around the shift linkage going into the rear of the ZF (Lloyd Butfoy said he'd never seen that arrangement on anything except an original GT-40), and a couple of other oddments. Unfortunately, Larry didn't write any casting #s down before it was sold.
In any case, the possibility of finding such rare parts are real close to nil, so 'restored to showroom-stock' is probably a most unlikely term to use on an early Mangusta. Since even a panel of experts (with electronic brains at their fingertips) can't agree on what was likely to have been originally used 47+ years ago.
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