Ford 460 Siamese Bore Cylinder Block; Cast Iron; 3 Inch Main Journal Diameter; 4.360 Inch Diameter Bore To 4.600 Inch Diameter Bore; 10.322 Inch Deck Height; 2 Bolt Main Caps On Journals 1 And 5 And 4 Bolt Main Caps On Journals 2/ 3/ 4; Not For Sale On Pollution Control Vehicles