1972 350 Chevrolet Pickup Engine - Tech - Build Your First Engine
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Adding a stroker crank to any block requires close attention to ensure safe clearance, as the rods describe a larger circle when the crank spins. With many years experience building stroker motors of all types, JMS has devised a "road map" that directs a series of crankcase clearance cuts to ensure the 383's 3.750-inch stroke (0.270 inch greater than the stock 3.480-inch stroke) doesn't make the rods go "clunk" with the bottoms of the bores. The work is done on the JMS Do-All vertical mill using a 1-inch rotary cutter. The resulting clearance notches average 0.020 deep. View Related Article
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