Found some footage of the racing at Nambucca in 1993 I think, has Gene Berg driving Jeff Unwin's Hellbug, also Hellbuggy and some more Bug Cam in the Turbo Oval.

http://au.youtube.com/watch?v=Iqfnw3cibGU 

http://au.youtube.com/watch?v=tBk53KKDb6g