Dart's SHP Pro Special high performance 9.025in deck blocks, a great base for reliable horsepower in your hot rod or race car. ||Key features that make these SHP blocks so popular are: ||* Precision machined, light weight cast iron block (175lbs)|* Big Block Chevy cam bore (2.120 in.)|* 4 bolt Billet steel main caps|* ARP main studs|* Siamese bores 4.000in. (unfinished)|* Extra thick decks ensure reliable head gasket seal|* Blind head bolt holes don't go through to water jacket|* Clearance for 3.75 in. stroke with steel rods|* 350 main journals accept commonly available crankshafts|* Uses +0.300 in. tall stock-style 1987-95 roller lifters|* Uses 1981-1985 stock style oil pan and dipstick|* Uses stock stamped steel or plastic timing cover|* OE bolt holes for starter, clutch ball, etc.|* Priority main oiling system directs oil to main bearings first for more dependable lubrication||Notes - Uses big block cam bore and 1981-15 stock-style oil pan and dipstick. Block bores are .10 undersized to allow for piston set up. 2pce rear main.