Foundation Crack?

>>1192919
Can you post a closer pic from straight on, and also 360 degrees pics? If its anything like my home, you can probably just dig out the outside and install structural steel on both sides with wedge anchors.
If theres any sinking to the foundation you'll likely have to underpin it which is likely around 20k if you had a split level where I am

Does it extend into the floor?

Hard to say without walking around and seeing it in context. Concrete does crack. That's just the nature of the material.
This would certainly be steel reinforced in '77 and this looks like a break all the way through, not just a surface crack. Interesting. Looks like it has been patched at least twice as well which obviously did nothing.
What's immediately above the crack? Any noteworthy structural members? How tall is this wall? How many stories is the house? Anything interesting about the soil on the outside of the building here? How steep is the grade, etc?