This 460 big-block casting uses a siamese bore design with solid material between the cylinders for strength in high-output builds, superseded by the M-6010-A460X and produced from updated tooling.

Ford Performance M-6010-A460 Block Specifications

• Fits 385-series 460 big-block Ford builds.
• Siamese cylinder bore casting with no water passages between bores.
• 4.360 in. to 4.600 in. bore range.
• 4-bolt main caps; requires stock oil pan modifications.
• Weighs approximately 275 lb.