Type:Crankshaft Drilling Fixture Balancer Bolt Tool. Sub-type: Crankshaft snout drilling fixture tool. The cranks are not drilled from the factory and adding the 7/16 bolt hole will aid you on installation of the balancer and retention of it.
Intake Valve Carbon Cleaner Walnut Blaster Adapter for GMC Chevy 5.3 6.0 L86 L83
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Crankshaft Drilling Fixture Balancer Bolt Tool For GMC Chevy SBC 235 261 348 409
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