This just makes me curious... rat rod? or Roth creation?
I sometimes can tell what the car under the cover is, but these have me stumped... I can tell it's a Chevy by the back rim... even probably a Camaro
'79 Trans Am?
 GN?
 '58 Fury?
 Ford Victoria?
 Also see: http://choosingscars.blogspot.com/2007/07/no-idea-why-this-photographer-likes.html#links