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Original Message
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| Get it sonic checked but first do the drill test. |
| By Royce Peterson - 09/28/2003 9:45:17 PM; IP 67.29.195.221 |
See what size drill will fit between the cylinders going through the freeze plug hole. Very few non - 428 blocks can be bored to 4.13 without hitting air. If a 3/16" drill is tight or won't fit between the water jackets you can get it sonic checked. If this test is not true you have a 390 block.
The casting numbers are useless.
Royce |
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