Help, broken case on oil connector

[Cado]

Hi all, I did some searching and couldn’t find if anyone’s had this specific issue before. Car is a 77 with a 80 engine. I took it out to have some trans work done, clean it up and install ssi’s and itbs. When I took the old heat boxes off I noticed the case was chipped around the oil connector. The old connector had Teflon tape and blue silicone around it. Looks like 2-3 full threads was all it had to hold on too! Didn’t have any major oil leaks. Some advice on how to fix it would be very appreciated.
Backstory is the car has 195xxx miles but don’t know any history on the motor besides it’s not original. Should I split the case for a shop to tig and machine? And have a full rebuild as well. I am in Vancouver Canada so parts come at a 30% premium with exchange rate. I have abt 15k cad or 11k usd. How would someone with much more experience working on these cars go about it with this budget?
With many thanks,
Isaac