This is an original RPO LS7 (XCH) block, out to 460" w/snowflake D-port aluminum Chevy heads. Decked, aligned, diamond honed, ARP studs and fasteners. Best of everything, Ross, Superrod, Callies, Comp, Crane Roller, Edelbrock, manifold to pan, 2-intakes-gas/nos. Made 697HP@7,000RPM 590-torque---9.37@147@3500# on gas! Call Phil @ 440-479-3440.