Ryan Falconer has these slightly used Chevy racing engines for sale. The specs are unbelievable, although they ought to be, because they are from the 2002 Indy Racing League season and have been converted for street use.
http://www.falconerengines.com
214 cubic inch/3.5 liter. Eaton 112 Supercharger, MOTEC FI, Dry Sump. 560 horsepower at 8,000 RPM on 91 Octane Pump Gas. 340 pounds dry weight. Bellhousing and Getrag 6 speed available.
These engines go to 10,000 RPM and originally cost upward of $130,000. I can't even imagine the noise these things would make in a Cobra.