177
I don't know about elsewhere in the world but would assume it is the same as here, the level chosen depends on your track, not the aircraft's heading (or your ability to hold a heading).
0-179 odd levels, 180-359 even.
I believe the terms track and course have different definitions in different parts of the world - but the concept is the same, ie even if you have a heading that is in the other hemispherical division, it is the intended or planned track, not the aircraft's heading, (which will typically be different due wind), that you use to choose the level.