Was surfing and came across these cool articles
http://www.motorauthority.com/news/1089925_hennessey-puts-its-twin-turbo-hpe700-corvette-stingray-on-the-dyno-video
http://www.foxnews.com/leisure/2014/01/27/nissan-reveals-400-hp-three-cylinder-engine-for-lemans-racer/?intcmp=features
I really like the Hennessey Upgrades, but its almost $70K with the upgrade options
http://www.motorauthority.com/news/1085565_hennessey-reveals-upgrades-for-2014-chevy-corvette-stingray
As far as Nissan powerplant, could you imagine that little engine a Z series car, power to weight would be sick compared to the standard 3.6L six they currently use.