This 350ci bare block is used on the 1973-85 GM Goodwrench 350 engine and has the early-style 2-piece rear main seal. Its main bearing caps are the straight type four-bolt design. The block has a standard 4.00" cylinder bore. Can be used for 302, 327 and 350 engines. This block includes: main bearing caps, main bearing cap bolts, freeze plugs, oil gallery plugs, and cam bearings. OEM roller lifters cannot be used in this engine block. This block has provisions for mechanical fuel pump.