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Good points, crueby. I did look at Jim's build thread for the same engine, and he used a reamer for this 3/8" hole. I will check prices on the 3/8" reamers. Thank's again.
Should be receiving my 3/8" reamer any minute now. Problem is that I don't have the right size drill if I want 2% left. Calls for a 9.25mm drill that I ordered but is not scheduled to arrive until next week. ...What would you do? Wait for the 9.25mm drill or proceed with the 23/64" drill ?