I think you always need little bit of adjustment with new sheet metal when you are working on a Pantera. Even a perfect part might not be perfect for your Pantera. I have no experience about those parts from Precision Proformance. Johnny Woods from UK is also manufacturing some parts for Pantera, but not too many of those on your list. He would be quite close to you. His parts were perfect, but my car wasn´t. http://www.woodsautomotive.co.uk/
And as a quess, there shall be more rust underneath.
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