40 years in storage (since 1976), and presumed destroyed because it was missing so long and never in the registry, a low mileage original owner GT 350 Shelby Mustang is going to auction, Shelby serial number 6S163

This car began life as a dealer demonstrator and occasional dealer-backed competition car in Framingham, Massachusetts, before being sold to a local customer who drove it for a decade, putting on 55,000 miles. He never told anyone about it, and drove it into storage in 1976.

The car is in marvelous time-capsule condition and includes its five original Cragar Shelby mag wheels as well as every service receipt and document from new, including the bill of sale, original handbook and Shelby literature. Even more fascinating is that this car is not found on the Shelby America register since the owner never told anyone about it,

if you want to learn all the detail trivia about the 65-66 Stangs, read this article from Hemmings, but it doesn't say much about this particular car http://blog.hemmings.com/index.php/2016/05/04/unrestored-one-owner-carry-over-1966-shelby-g-t-350-heads-to-auction-in-connecticut

http://www.bonhams.com/auctions/23513/preview_lot/4968082/
http://www.thedrive.com/vintage/3329/this-beater-66-shelby-gt350-is-a-dusty-diamond-for-100000