Original 273 Motor & Carb out of 1967 Dodge Dart GT

I wish I could pick it up but I'm in Colorado. Just curious... on the block on the drivers side front just under the head there are date and other numbers stamped into the block. What are they?

Thanks

By the way. The oil light at idle and slight click on startup sounds exactly like my 150000 mile old rebuilt 67 273. I upped the oil to 10W40 and changed the pressure switch (leaking) and the oil pressure holds fine. The clicking is most likely the mechanical rockers not quite adjusted well enough on a cyl or two.

also is it a real HP 273 or a dressed up standard 273?