Seller notes

Use this very reasonably priced tool to help drill the snout of cranks (includes USA made tap and drill) Fits Chevy inline 6 194 230 250 Chevy 348, 409 SBC 265,283 and 327 and all small block Chevy Chevy inline 216, 235 and 261 GMC 248,270,302, Chevy 153 4 Cyl also as used in Mercruiser and ChevyII . 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. Much better than hitting it on with a hammer. Precision ma...

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