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Original Message
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| If early 60s it's a plain 390, later a 428 or 361. |
| By Dave Shoe - 09/29/2002 12:31:43 PM; IP 67.4.129.97 |
On a block dated from the later 60s, it's most likely a 428. Since it has a 361/391 bore, yours is usual.
Still, the forums have so far only found "trends" in the markings, and not hard rules. As long as a 15/64" drill bit will not fit between the cylinders at any reachable location from the six core holes, you've likely got a solid starting point. A sonic map will tell you for sure.
Shoe. |
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This thread, so far...
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