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Chevrolet Small Block & Big Block, 3 pieces, 12pt Lower Pulley Bolt KitCrankshaft Pulley Bolt Kit - High Performance - 3/8-24 in Thread - 0.750 in Long - 3/8 in 12 Point Head - Stainless - Polished - Chevy V8 - Kit As always, 21 Motorsports offers FAST...