1970Chevelle Block Stamp Opinions LS6
 

1970 LS6 block stamping, does this stamp look good. The number is 6 before the 45, flash reflection, sorry about the picture quality. Thanks.

No pro here, but 1st impressions: Don’t like the broach marks (or lack there of). And the partial VIN font size is too big. And partial VIN should be up right with Tonowanda stamp - both upside right - both readable from front of engine.

I’ve seen legitimate factory stamps upside down.

The vin number should be a smaller font. All the vin stampings I have seen on different cars were a smaller font than the engine stamp.

KC cars are stamped upside down and used a larger font in '70. I'm not sure about the lack of broach marks though.

Actually, Kansas stamps are completely different than the other plants and are stamped upside down and are bigger than the other plants. They have very unique 6's and 9's that are easily spotted. I too have issues with the lack of broach marks and it would be nice to see the rest of the deck area that was not exposed to see if they are there. I have this car in my registry but have never laid hands on it. The VIN stamp matches my other samples but still checking to see if I have a similar Tonawanda stamp.

Assuming the flash has washed out the broach marks,and they really are there,I like it George.
Everything lines up with originals I have seen in this series.

I think the block was sand blasted to clean off rust, from what I was told, Would that make the broach marks look non-existent ??
Here is another example of a 1970 block with the same size font. Hard to see broach marks on this one also

Another from my files..

Check with Oliver P of Canada. He used to own this car and may be able to enlighten you on its history.