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Greetings,
I have been working on cleaning the engine of my 67 Coupe, and under the grease and grime I came across what looks to be a date written in yellow paint on both sides of the lower block. It looks to be either 3A14 or 314. If it is in fact a date, the date would correspond with my serial number and tank sticker. Per the previous owner the engine had never been taken out! I didn't see anything on this in a search, so I thought I would post a picture of it and get your thoughts
HE was probably written on there during assembly. Block was upside down at the time it was written ! Good find. Always neat to see these markings that have survived.
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It is an "HE" block but why would it be inverted and written as "3H" on the side?
The first station on the engine assembly line at Flint V-8 (and at Tonawanda) was an air-gaging machine that precisely measured the bore diameters; the block was upside-down in that station, and the suffix code was written on the side of the block so the assemblers further down the line would know what innards (cam, crank, rod/piston assemblies, lifters, heads, etc.) that particular engine required. It also showed the pad-stamp operator which suffix gang-holder to use after the heads went on.