What are the specs on casting GM Engine No 3970010?

The GM Engine No 3970010 is a cast-iron engine block used in the Chevrolet Small Block family of engines, which includes the 265, 283, 302, 305, 307, 327, and 350 cubic-inch engines. The 3970010 casting was introduced in 1955 and was used until 1967. It is a two-piece design with a separate cylinder head. The block is bored and honed to a finished bore diameter of 4.000 inches. The main bearing journals are machined to a finished diameter of 2.450 inches. The camshaft bearing journals are machined to a finished diameter of 1.938 inches. The block has a deck height of 9.025 inches. The lifter valley is 2.562 inches wide and 1.750 inches deep. The water pump mounting surface is located at the front of the block on the passenger side. The oil pump mounting surface is located at the rear of the block on the driver's side. The exhaust manifolds mount to the cylinder head on the outside of the engine block. The intake manifold mounts to the cylinder head on the inside of the engine block.