ALSO THIS IS WHAT I HAVE DONE WITH MY FE MOTOR. I TOOK A MID TO LATE 60'S 390 TRUCK BLOCK (SONIC CHECKED IT) I HAD IT BORED .080 OVER. I PUT STANDERD 428 PISTIONS AND CRANK IN IT (MUST HAVE EXTERNAL BALLANCED DAMPNER AND OR FLYWHEEL,FLEX PLATE)(428 CRANK ONLY!!!) DUAL 4 BARREL OFFENHAUSER MANIFOLD WITH TWO EDELBROCK 500CFM CARBORATERS. I LOVE IT. BUT I DID HAVE TO UPGRADE MY RADIATOR TO A 460 4 CORE FOR ADDED COOLING IN THE SUMMER WHEN STUCK IN TRAFFIC.