Sounds like a fun project. Check out
www.mautofied.com and racingjunk. there are several coupes out there that are already mini tubbed and are selling dirt cheap! If I get a minute, i may search for them and post the links. I've been eyeing them up myself, but my wife would shoot me if I said I was building a cobra AND buying another coupe! haha
Josh
This is the one I was mostly looking at. Mini tubbed, 4130 10pt cage, and a bunch of other goodies for $6200.
http://www.racingjunk.com/post/90726...ni-tubbed.html