You can weld a bung anywhere on your downside exhaust some where in the middle after turbo
A Wideband is not specific to Vehicle
Or you can use a clamp on solution they make different sizes. Many companies to choose from. 1-3/4"-2" Clamp-On Wideband Oxygen Sensor Bung Adapter -...
Boost + egt + lambda = safe
You can have low boost and be unsafe if fuel is not tuned correctly.
Some can say factory turbo is safe up to 14psi but what does that actually really mean? How safe and why?