Dart Big M Sportsman Block with 10.200 deck, 4.500 bore and ductile caps. This is a brand new Dart factory second. The issue is the mains are oversize by .0025 and the cam bore has a rough finish. Neither of these 2 issues will be a problem by using +1 bearings on upper & lower mains and the cam tunnel will not matter once the cam bearings are installed. We also have many other blocks, heads, cranks, rods, pistons and much more. Call or message me with your needs.