Small Block Ford 454 windsor stroker motor. This is one bad A## engine, with only 10.4:1 compression making this a very freindly pump gas engine.
This engine produces 643 horsepower at 6100 RPM and 597 ft pounds of torque at 5200 rpm. Torque at 3500 is over 525 ft pounds making this engine a tire frying machine
Here is the link, check it out
http://www.cnc-motorsports.com/product.asp?ProdID=25198