Allegro II show car--one site says it was on Cobra chassis

In Legendary Ford magazine I have been following the story on restoration of the "Italien" show car, a Thunderbird, and found there's a website involving old dream cars and on that website I found a mention of the Aurora II show car, which I remember as a gold open roadster which I thought was cut down from a red coupe show car, the Aurora. but on this website they say under " Allegro :

"Anticipating the design of the Mustang 2+2 fastback, this concept car was also fully functional and was built on a Cobra frame. It was later heavily modified into a trendy roadster in 1968 and was renamed Allegro II. "

The credit goes to Mark S. Gustavson Concept Car Photo Archives.
I'm doubting Ford had a Cobra chassis at the time the first Aurora was shown, but then I don' t have my Mustang library with me to look it up the first time the Aurora was shown.

Here's the website but they don't have pictures up yet of the Aurora II.

http://www.customclinic.com/Concepts/FoMoCo/fomoco.html

Any Ford old timers have an opinion on whether this candy gold (open version) or candy apple red (coupe version) was Cobra chassied?

 

Re: The internet has no editor

That's one problem with the internet,there is no overall editor to say
"go back and check your facts."
but since the Mustang II was built on a 1963 Mustang chassis (must have been pre-production)
there's still a chance the Allegro II was built on a Mustang chassis, but I have to check on when it was first pictured in magazines. I wonder if the Allegro II still exists? The Mustang II does, in the Owls Head museum.