Quote:
Originally Posted by Dans1960SWB
I think the hole is already there just not threaded. You need a bolt from anyou small block chevy...BBC is bigger I believe...I can measure one if you would like. It does have a super thick washer that goes under the head..
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No, the hole is not there. There is a starting dimple about 1/4" deep. I found that I used a 1/4" drill bit (IIRC) and did the first drill into the crank. The I stepped up a few sizes, drilled and then to the final tap size. Basically three drill bits to get to the tap size. Then tapped the hole. Being cast iron crank, it drills and taps very easily.
Make sure you get the correct drill size for the tap you are going to use. No getting close, get the right one.
As for the bolt, Mr. Gasket has them (most auto parts places have Mr. Gasket stuff) or you can order it
Amazon.com: Mr. Gasket 945G Harmonic Balancer...
Take your time.