sounds interesting- but:
If you are attempting to achieve the results of the Busa-powered Smart car, I think you will be very disappointed. The Escort weighs much more than a Smart car, and even tho the "numbers" show you will have a quick car, I personally don't think the results will be that. I could be way off, too.
I would also imagine you would want to modify the Suziki engine to make its torque at a much lower rpm if possible. Not that hearing an Escort hit 11K+ rpm's wouldn't be "neat", but i don't think the tire-shredding results you are looking for will be there.
I could be very ,very wrong tho. As stated above, it might not have the "cool" factor, but reaching a more usable high hp number with the current platform, and $3000.00, might be your best course of action.
JMO