Hello Folks,
I'm Mike, and I live in Western Canada.
My father and I have acquired, what we think, is a fairly unique engine.
The serial number is CB750-1000767. Note that there is no "E" in the serial number.
Further, this is not a sandcast engine (unfortunately). It appears to be a very early die-cast engine.

We were told by the previous owner that it was a warranty replacement for a failed sandcast engine.

Our intention is to restore a bike that is as early a 69/70 CB750 as possible, including as much sandcast hardware as we can.
The original frame is gone, but we've acquired the earliest frame that we can; CB750-1016086.

So first, I'd like ask the group about the "uniqueness" of the engine.
Second, anybody got a frame that's close to 1000767, that they're willing to part with?

Thanks in advance,
Mike