Quote:
Originally Posted by johnta1
So, the ancillary equipment like alternator,etc would be a larger spread (newer) from the engine dates?
(instead of 10B dates it would be 05B dates)

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John, that could be. Or it could be that the engine was completely dressed out but not yet installed in the car (and partial VIN stamped) when the "defect" was discovered. If the latter, even the accessory items could be early dated. I'm not sure how complete the engine was before it was run on natural gas (I'm assuming they were still doing that in '68). But if not already dressed, perhaps what you suggest is true. Greg would need to tell us what he sees.
And my suggestion is pure speculation. It could be this YS simply got buried in engine inventory and grew old waiting its turn, in which case the dress components would likely show much later dates.. Luckily the PHS shows the EUN otherwise it would be easy to doubt the block.
Anomalies are interesting although often confounding in the absence of documentation. As PurelyGTO68 points out, documentation is a big help as it has in this case.