Brand New--Cast alum cover fits 55-58 Chrysler Hemis, and also some early *Chrysler* Poly Blocks...(354) The water pump bosses are cast into the cover--no adapters needed. Cover is for SMALL block Chevy pumps--long or short. Block to pump surface is 1" and O.A. length (excluding seal boss) is 1-5/8". Takes a 3" dia. O.D. seal & comes with stainless Allen fasteners--no washers, gaskets, seal & no pump bolts. Must use a short nose camshaft, and no provisions for a stock fuel pump. I'm not certain what the threaded lower bolt holes are for. This gives a guy some options when selecting a water pump, as SBC pumps have different water outlets than a BB pump...(Htr. hoses, upper Alt brackets whatever) I have never seen a cover like this that utilizes SBC water pumps with cast-in adapters for a SBC. $450.00 & I'll pay shipping in lower 48.--- OBO & buyer pays shipping. Thanks H.A.M.B.--Merry Christmas