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The oil pan side rails in the Dart SHP block are clearanced using a CNC machine. There’s clearance for up to a 3.750-inch stroke with steel rods. Engine builders will rejoice in not having to spend a day grinding the block by hand, and a half day of cleaning the block after sending metal everywhere. The pan rail accepts a stock or aftermarket oil pan and gasket, although it uses an ’81-85 style pan and right-hand dipstick tube.