My oil burning pig. Pics too!

I bet its the valve stem guide seals leaking and with no PCV in it the crankcase gas pressure is helping push the oil out the leaky valve stem guide seals.

VERY possible the machine work was done and done over sized, (machinist DO make mistakes) so. they're as human as you or I and or the rest of us here. SO.....

Get a PCV system going, could the crankcase pressure be forcing the oil? (I'm not sure of that one!) BUT is it possible that could be aiding the oil leak?