I don't have my 2007 rule book at hand so not sure if rule has been changed but rule 2P (in prior years) says 4 wheel drive is legal in Production and Special construction only.
To make a car legal in ALT is easy (cover grille and/or headlights) To make it legal in Comp Coupe is not so: CC REQUIRES one of the following: Top chop, full belly pan, lengthened front minimum 12" or engine set back. My sense is only the belly pan is an option for you. However, unless the 2P rule is changed, you can't run in the Modified Category. Could someone double check that for him?
Jack