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RE: 390 overbored 060 By Lew - 02/23/2004 6:08:52 PM; IP 63.187.73.36 I have tried the 15/64 drill bit test on the front two core plugs of my 1967 390. On one side the 15/64 drill-bit would not pass through the cylinders. A 7/32 drill-bit did, but barely. On the other side of the engine, the 15/64 drill-bit would pass only toward the upper part of the cylinders. It would not pass through the center or lower extremes. So, what does this tell me? Thanks in advance.

This thread, so far...

Skip Navigation Links.  390 overbored 060 -- Lew, 02/21/2004  RE: 390 overbored 060 -- steve, 02/22/2004  RE: 390 overbored 060 -- giacamo, 02/22/2004  RE: Depends on how you read it. -- Gerry Proctor, 02/23/2004 RE: 390 overbored 060 -- Lew, 02/23/2004

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