Latest COPO Date and Latest 512 block date?
 

I was contacted by a older gentleman who has some 60's Big Block items he is ready to part with and one thing that he had, has me a bit curious, he told me he has a Nov 69 512 block- that seams a bit late for a 512 so my question is what is the latest known 512 block and the follow up to determine a value what is the latest known COPO date?

The block front pad is blank from the factory and still has the broach marks I'm told
I assume this might have been an over the counter block.
I will not be able to inspect the block for more than a week, due to travel so that is why I am looking for some help

Thank you
Fred

Re: Latest COPO Date and Latest 512 block date?
 

That would be a LS6 block they made them thru 1971