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Big Block Chevy Flanged Crank Bolt WHEN USING A RCD SUPPORT
FITS CRANK SUPPORT HUBS NEEDING LONGER THAN RCD BOLT BB CHEV & SB CHEV W 1/2-20 THREAD
1/2-20 X 2.75" 1.40 FLANGE 1/2-20 THEAD.
When not Using a support use 358850-38 Bolt