Once upon a time it was a 5.0,this jewel has a motorsport block and is stroked up to 361 inches.12 to 1 comp,solid roller,scat steel rods,scat steel crank,comp cams stainless steel roller rockers,Canton block girdle,Comp cams stud girdle.Its also got a Moroso 9 quart oil pan.That intake is a Parker Funnelweb the carb is a Holley 750 dbl pumper. .........gotta love the way this thing sounds......