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Discussion Starter · #1 ·
Hi guys,

I seem to have a strange thing going on with the LH cylinder head on my 1974 646. I'm starting to wonder if the head is the right one or not. I was wondering if anyone had a 646 that was older than mine and has the original CCKA engine. My serial number is 9698903 so anything before that would be a good benchmark for information. I have a CCKA rebuild thread in the Onan section with a little more detail.

Any help is appreciated.
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