MoonRaker, have you contacted the Baja organization to obtain rules and classifications documents? In racing you don't even begin planning until you've gotten all your research done and know EXACTLY what you need to build and gather for the effort. You just don't roll up to tech and say "I'm here to race" and expect to get your numbers. Not to mention you'll likely be expected to provide documented proof of racing instruction and experience, such as an FIA racing license.
I did the 1995 La Carrera Panamericana in mainland Mexico and also took a stab at 500 miles of the Baja course in a Baja Challenge car early 2006, and can certainly speak from experience that if you just jump into this without first contacting the event organizers and sactioning bodies you're going to leave a huge hole in your wallet and ego.