Oof, what a nightmare. Wishing you good luck OP.
If you have the room, I'd use a regular 45 instead of the street fitting.
Yep, it won't be easy. That's about the worst place for a leak, especially working with an angle
Ok. I’m going to try this. I hope you guys will stay with me to help me through each step where I might need to take a pause. I think the hardest steps will be cutting the oblong hole - I’m guessing it’s time to go buy an oscillating multi-tool. Is there any other tool that you can see working for me here? The only tool I have that seems feasible in this small space is my Dremel
But the blades are not deep enough. But would love any ideas here.