Here's my assessment. Auction buyers for eye watering prices (at least at Pebble, Scottsdale and Amelia) don't give a rip about originality, correctness, what the factory did, original color, original engine in it, is the clamp right, or any of the other stuff we discuss on this site, for high production sub-$500K cars. The buyers paying the big bucks care about mostly two things, is it new and is it beautiful. And, beautiful alllows for wide latitude, non-original interesting color combos, blinged up engine bays, special upholstery details (how about a classy armrest!), you name it. These are cars to be seen in at parties and country clubs for the money-means-nothing crowd, hence the head shaking prices for what seem like inferior cars to the educated (factory correct) crowd here. And let's face it, most everybody here would be too cheap to pay the high prices achieved at auctions.
The exception, Porsches.