[jeffschevelle]

This is a little bit off the original topic since that was asking about a 69 (which would be a gang-stamped VIN). But it expands on some of the other comments above.

It is often commented on many different Chevrolet forums that the engine and trans in one car were always stamped using the same stamp, so they have to match. That might have been true at all the plants at some point AFTER 1967 production, and it might have been true at SOME plants in 67 and prior (maybe including Norwood, based on one of the comments above).

But that was NOT the case at any of the plants building Chevelles in 66 and prior. Original engine and trans stamps from the same Chevelle in 66 and prior typically don't look anything at all alike. Different sized characters, different fonts, and individually stamped characters (not in a gang holder) are the norm for 66 and prior.

As to 67 Chevelles the same held true all year long at some of the plants. At others the two stamp sizes and fonts do match up LATER in 67 production, but not at the beginning of 67 production. But that does not necessarily mean it was the same gang stamp being used on both engine and trans; it might just mean the dies being used in the two different stations were finally made uniform and gang holders were finally mandated in both stations.

Also, look at the 67 Corvette example above. Even ignoring the digit error, there is no S in the engine VIN, but there is an S in the trans vin. So the engine stamper and the trans stamper were obviously not using the same gang stamp on both parts at the Vette plant in 67 ...

Side note --
The Fremont plant did some very interesting things on the engine stamp in 67 and prior. During part of the year in 66 they used a gang for a partial stamp (6Z1), then added the remainder of the characters by individual stamps. And during part of the year there were very obviously two different sets of dies being used on two different lines, because some verified original 66 engines have larger characters than others.

Then as the 67 model year progressed Fremont changed the stamp format at least 3 or 4 times, and during one stretch they used a gang for 7Z1234, then added the last 2 characters by individual stamps (which are not the same size or font as the gang). And that resulted in MANY examples that have the last character of the gang stamp (4 in my example above) overstamped with the next higher number because they failed to change the last character in the gang soon enough before the next 100 VIN group commenced.

And other VIN stamp errors on Fremont engines are VERY common -- some minor like one character being off, and some very egregious ones, especially on some 66 engines (with 5 being used for the year instead of 6, omitting the 1 in the first slot of the sequence number, using an upside down 2 as a 5 and vice versa, and on and on). I am actually more skeptical of a 66 Fremont stamp without any errors than I am of the ones with mistakes!

Although a little off topic, this is all to point out that mistakes were not that rare at all in 67 and prior. So it's easy to believe a single digit mistake could be made at Norwood in 69 as well.