Hello,
I don't know Jack real well. (He's friends with my brother Ted, I'm just helping out with the web site) but it's my understanding that Jack will build what ever you want... just a body or a turn key car. Of course I can't speak for Jack. The best bet is to give him a call at 520-689-0100.
There is a link to his email on the web site
www.nafcobra.com but I don't think he checks it very often at this time.
Regards,
Vince.