So this weird 64 or 65 Mustang was running off from a race with the broken nose section of a GT 40 because Bob McLean crashed and died... just looking at the weird spoiler on the trunk, the weird stripes over the spoiler... and you quickly get to wondering just what oddball was driving this car.
but Marc noticed a small strange detail... the license plate!
It's not an ordinary registration plate, it's some thing used for delivery of cars, not on a transporter.
Automotive business plates, 1954-1970
Transporters are either in the business of moving or delivering vehicles, or in a business where moving or delivering vehicles is incidental to the primary activity. These plates allowed them to drive otherwise unregistered vehicles on the street rather than have to load them onto a truck or trailer. A typical application would be for driving freshly-imported vehicles from the docks to a storage lot a short distance away. https://www.ricksplates.com/maryland/mddealer.htm
This morbid sicko taking off from the race with the nose pieces of a dead guys GT 40 was probably borrowing a car from a car dealership where he worked, maybe it was on the used car lot, and that is why it's got decals on it calling it a SS GT. There is a short haired male passenger in the front seat too
the series of photos is in the bottom half on the page https://revslib.stanford.edu/?f%5Bphotographer_ssi%5D%5B%5D=Stanley+Rosenthall&omit_keys%5B%5D=q&omit_keys%5B%5D=search_field&omit_keys%5B%5D=qt&omit_keys%5B%5D=page&page=7&per_page=100&q=12+hours+sebring+1966