Here is some pics of the case for my soon to be 6 speed 4L80E, first as I got it from the trans guy, basically lopped off with a plasma cutter and "Cleaned up" with a die grinder:
I cleaned up the casting snots on the top of the case because they were provoking me:
Had the machine shop throw it on the mill and clean up the front to make it even and parallel:
Bolted on a deep cast aluminum pan:
...and dropped in the pump which is where the "plate" will bolt onto and the 4.2's 4L60E bell housing will bolt to it:
Still need to have the outer ring of the pump milled flat (except there the oil galley protrusions are).