Shadow measuring
Haraka:
Without actual measuring the shadows it's easy to see that the center of the F-100 fuselage shadow lies just as much to the left of a line between the concrete-slabs as the shadow of it's port wingtip does to the next line.
With other words, it's wingspan is equal to two concrete slabs.
The pusher is parked in a way as it is easy to tell that the port wingtip is about a yard on the inside of such line and the starboard wingtip more likely two yards inside the contemporary line - In other words: The pusher is 3 yards less wide than the Super Sabre!
Matches fine with Your estimate of about 10 feet in difference for a 75% replica!