It's got weard stripes compaired to all the other 7 Eleven cars
this is the closest I could find to those markings but even that just looks all wrong
Link
here
Not unless it was meant to be the 7-Eleven Mustang GTP IMSA racer # Ludwig/Rahal car but who ever has the car now got the graphics wrong
Other option send old Jack an email
www.roush.com
Edit, here is another one, dont look right though
http://alex62.typepad.com/.shared/im.../wollek84a.jpg