The pan for the Chevy IIs is a rear sump, but the portion where the steering passes is also more shallow than the rest of the pan. It rolls off on the sides as well.
We used to build pans with an oval shaped tube passing from one side to the other for the center link to pass through so that we could increase capacity.
There used to be a couple of aftermarket pans out there, but I haven't looked in YEARS!!
Somebody here should have a picture of the Chevy II pan.
