[yeoldeoddy]

That would be quite a project just to fix a damn leak! I would be thinking about selling it.
A large drip pan or park it on the street won't do it?
Did you try a much thicker oil? like 20w-50 regular oil. Synthetic is usually thinner and flows better at same weight so that's NOT what you want.

 

[yeoldeoddy]

What oil weights have you tried? Maybe try a slightly thicker regular oil, like 10w-40.
Other's have reported getting new oil leaks with synthetic.