If you're in the States google on Tousley Ford - call the parts desk and ask for Steve. He will be able to tell you what is possible and what it will cost.
Have your checkbook ready. It is likely to be cheaper to sell whatever you have now and make it a down payment on the genuine article.
FWIW - there's are SO many sources that you can use to build a car that will kick a Shelby's tail (my 2001 572HP 2V will!) and for far less money - try starting with a decent forum like: