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GM 10SI / 12SI Alternators
Custom-molded to match the contours of your vehicle's hood
7/64 x 3/4
Useful for Low Rear End Gear Ratios
85 and earlier Small Block Chevys with left or rear mounted starters
Callies Magnum Crankshaft - SB Chevy - 3.800" Stroke - 2.100" Pin - 400 Main 2.648" 725015 GM 10SI / 12SI AlternatorsA combined effort by Callies CNC programming and engineering staffs has resulted in a component that is distinctive and highly functional. Unique counterweight and rod arm contours produce a lightweight, aero efficient crankshaft. Callies Series II Mangnum Mass Correct counterweights have been placed specifically to reduce bearing loads. By concentrating mass at the point of imbalance, the transfer of rotating and reciprocating assembly weight loads
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