No the problem is, people in this country dont tune Fiats like they do in Europe.
The difference with JDM cars, is when they get tuned, the parts filter through a popular aftermarket. With Fiats they dont.
You can just slot a 1.6 bottom end in to a GT. You can bolt a 1.6 16v engine straight in, perfect fit, and turbo it... People are ONLY just widely fitting coupe engines.