Lots of ideas here!
Unfortunately the four foot pipe and BFH didn't work for me either.
Starter motor trick sounds interesting but now that the engine is currently out, a bit of a pain to put it all back in, and out again, to get a nut undone.
This doesn't sound clever I'll admit... But when the engine is mostly built up again, simply attach the starter to the engine, hook it up to a battery and whack the wrench against the ground? Is that the recipe for disaster that it sounds like, or actually perhaps not quite such a stupid idea?
I would consider killing it if only I could find anybody selling new ones! No luck so far.
Question: if the oil seal is fine, then there's nothing to worry about. But if it starts leaking one day, what's the worst that could happen? Besides needing to check and occasionally top up the oil?
P.S. Lol sorry Alfettaparts2 I'd happily help you with your car if I could!
1975 Giulia GT1300 Junior, 1981 GTV6, some modern German stuff, and a 1958 Messerschmitt KR201.