I just finished the rebuild of my original 390. I would agree with the statements above. I presume most all the details on the BB engine would be similar.
Mine had over spray on the bell housing on both sides pretty heavy and drips running down it.
Also did not have the inspection cover at bottom on it when painted, Mine had blue paint all over the flywheel and part of the pressure plate.
Also the partial Vin is stamped into the trans case at the top. Same number stamped on the LH back cylinder head of engine. I have not seen one stamped in the bell housing as of yet.