For the 5.0 conversion costs are about 15,000 they say...
Turbo 3L runs about 7,000 in parts. With this package you could have a car that you would keep for the next 15 years. if stock handling were retained, you would have a sleeper, a very fast car with an engine that has basically unlimited mod potential, and beautiful styling...When you add those all up, and think about keeping a car of this caliber for the long run, it's not that bad of a deal.
Just playing devils advocate.
