It was originally supposed to be a $6,000 upgrade before the project was scrapped and the one car sold. It was also shown in one of the FFR promo vids.
Allen English bought a Kirkham body to adapt to his but there are significant differences is the way the bodies attach and he sold it.
It does seem like I saw a more recent pic of what sure looked like an aluminum body on the FFR site though......
Mike
(no charge for the rumor mongering
)