What I would do is call Mark Yacavone and buy his mustang for $11,800(see link below). You'll get a car that will set world records and you'll never have to worry about losing a heads-up race. Then I'd take the money you would have spent on either the Nova or Malibu and fix those two cars up so that you have a couple of nice street cars that you can either drive or or sell.
Why no one has bought Mark's car is beyond me-I'd do it except that all my money goes towards making my comp car go fast!
http://classracer.com/classforum/showthread.php?t=10722