I'll see what I can do. The manifolds are still on it. I would have thought the number stamped into the cast iron (20205)would be a sequential production number but my searching did not come up with engine number data. I'll have to go back again. It's in a very cramped space. Does it make sense to remove the carbs and manifolds and sell them separately?

The yoke looks like it may have been for a parking brake, as it looks like a mini disc brake rotor. I don't recall have that on my 71 142E, but it has been a lot of years.

I know it is just a casting number. I was not sure it there was a date code in the second or third row.