What are the specs on a GM 6.0 liter Vortec engine?

The Vortec 6000, also known as the LQ4, is a V8 heavy-duty truck engine manufactured by General Motors, first released in 1999. It is available with many Heavy Duty trucks, including some Chevy Silverado models, the Suburban/Yukon SUVs, and Express/Savana vans. The engine uses advanced technology, including a thermoplastic intake manifold and aluminum cylinder heads. It produces 323 HP and 373 lb.-ft of torque.

Monday, February 06 2012
Source: http://www.workhorse.com/default.aspx?tabid=310