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Re: Question for you restoration guys and our purists?
The best and safest way to build backward is to match up to another stock vehicle from the same plant and timeframe. The closer in date, model and content the better.
So try to find another 12/66 build C10 or 20 from Janesville and see what it has. That will help give a window for block lead times. Actually any 12/66 build with a Flint assembled engine will be very helpful dating all the casting numbers. But unless you are planning a restamp, any date other than 1220 or a suffix code other the YH will not be correct.
No doubt it was a 4bbl, the 2bbl 327s were a 40 up truck series engine. The 2bbl C10-30s were 283s.
If your truck had been built wth K19 (A.I.R.) it would be on the SPID and the engine block would have been coded YJ.
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