Panteras were hand-assembled, then welded in steel jigs at the factory, so its hard to understand how a structural part (in a monococque, all body parts are structural) could be added 1" off. The only time I've seen this is with a crash repair where someone didn't check closely before welding new or replacement parts in. And heaven knows that a LOT can happen- good and bad- to a car in 45 years. Undercoating can hide such weld additions.
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