RAMM wanted to know about this 451..............

The 451 was conceived in this fashion.

In 1982, Pop built a 440. His ported Stage IV iron heads, 800 cfm Holley, Holley Street Dominator, Clay Smith Roller cam R-310-8-SB, 12.5:1 compression, and he made 593 lb-ft @ 4,500 and 630 hp @ 7,000 rpm.

So in 2005 Cody said, "Hey, can't we do something like this?"

A year later the 451 was born.

So in 2006, the same short block we used in 2009, minus the ARP main studs, but using a stock factory windage tray, with a plenum welded Mopar Performance M1 single plane changing it into a 4150 style carburetor plate, our ported 452 factory iron heads, 950 cfm Quick Fuel, Comp Cams XR292R solid roller and 9.5:1 compression, made 588 lb-ft @ 4,600 rpm and 621 hp @ 6,100 rpm.