Eelco,
Essentially a 0.030-over 350 with a 3.750-inch stroke, the 383's extra cubic inches are almost free when compared to the cost of retaining a stock 3.480-inch stroke. Gone are the days of digging up a 400 crank out of the junkyard and grinding down the mains to fit inside a 350 block. The 3.750-inch stroke small-block Chevy crank, whether cast or forged, is one of the most popular aftermarket cranks ever produced. Furthermore, the relatively short stroke allows fitment of rods up to 6.125 inches while still retaining 1.000-inch of compression height with a standard 9.000-inch deck height. "The rod bolts will hit the cam whenever duration exceeds about 220 degrees at 0.050 lift, but a small base-circle cam eliminates that problem," explains Judson Massingill of the School of Automotive Machinists. "Other than that, when using an aftermarket oil pan, the only other clearancing required is some minor grinding at the bottom of the cylinders when using a factory block."
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