Magical oil leak

Sorry to hear. Fighting the same thing.
Leaks just enough to piss me off.
I can lay up under it running for half an hour, and not a drop, but park it and it drips a quarter size spot from the bottom of the bellhousing.
Hoping mine is the oil line to the guage. Finally got the valve covers sealed up good ( I think ) ,but the starter is getting wet.
Don't know where else to suspect coming from that high. Head bollt, or gasket?
Should ARP head bolts be re-torqued with aluminium heads after installation?