If you are very frugal, can spot deals when they come up, and do all of the work yourself, You should be able to build a Factory Five for that money. You would have to go completely donor by finding a good Fox body Mustang and watch for FF5 to have a sale but it can be done.
Check on
www.ffcobra.com and also check the classified ads on their site and you just might find what you are looking for.