[JIM]

Here are the Facts that Exist !!!
I have spent years tracking down original dated parts to build a What If LS-6 71 Convertible.
Specific engine codes were created for both an Stick and Auto configuration
The 6500 white face dash cluster does exist picture attached and part number pictured
026 dated heads exist that were specific to that application only with production 71 dates
The 569 intake with numbers on the runners exist in a larger quanity than 71 LS-6 Corvette production dated again to a production line build.
4802 and 4803 carbs dated to an assembly line build exist
054 and 075 71 LS-6 distributors exist with the same production line dates,
myself and many other Chevelle Guru's have these or have had these in their collections.
Yes it was slated for an Assembly line build and scrubbed before prodution started.
But the parts that were needed to build it were made months maybe a year in engineering before they found there way into cars and the parts system , the tachs have been noted for years in cars.

Does one exist Maybe, but you should probally look for it in a 70 Test Mule car from the Proving Grounds, and the press cars were all pre prodution cars just for media , handbuilt as we all know !