K member notching question

My understanding is that because of the angle required when putting the engine in from the top, the front of the oil pan is more forward than it would be if the engine was not angled and I’m not sure if that is the only reason the K member gets notched. Would it still need notching if the engine were not installed at an angle? That is the question.
I've taken many engines in and out of these cars thru the top. There is no need to notch the K frame to clear anything. Not sure who told you that or where you got it from. But even deep sump pans clear.