Maintains 4.25" bore size and water flow between the cylinders for improved cooling and sealing durability. If you want to drop in a Hemi where a Big Block used to be, select the block with cast/drilled ears to accommodate the Big Block engine mounts. • 100% CNC machined for accuracy and quality • Brand-new castings made from high nickel alloy cast iron • Thicker deck surface for improved rigidity and gasket sealing • Ductile iron main caps, which are cross-bolted on the 3 center caps on all the blocks • Stock 10.72" deck height allows for installation of all standard components • Machined to accept all standard production pieces, such as heads, manifolds, water pumps,tappets, cams and distributors • Machined and cast in various configurations to meet your specific requirements. • P5007627AB features a raised cam (0.250") for longer strokes and more cubic inches. Stroke size of up to 4 1/2" may be used. Requires special UGL camshaft (P5007713), cam gear and cover set (P5007657), special oil pickup and intermediate shaft modifications.