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The block's finished bore size of 4.50 inches is matched with a 4.50-inch stroke Callies 4340 forged steel crankshaft. The rod journals are undersized at a big-block Chevy spec of 2.20 inches, reducing bearing speed and increasing stroke clearance in the crankcase. The Eagle 3D connecting rods measure 7.10 inches and are sized for the Chevy 2.20-inch crankpin, and likewise accept a 0.990-inch Chevy big-block piston pin at the small end. Pistons are Wiseco small-dome forgings as spec'd by Indy, and weigh-in at 755 grams. The combo provides a rod ratio of 1.58:1, very reasonable for such a long-armed crank-got to love that tall block deck that makes it possible. View Related Article
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