A-Draft tube allows vapors (not
oil) to escape down into the tunnel. That's why it comes off a top one.
B-Back of manifold, if you need a plate check my site.
C-sump to the Pom
D-trans is the gearbox, I put a little tube welded in to top of trans cover, you could drill and tap for a small hose barb also.
The tube that goes to the
oil pan comes off the bottom of the tank draining any yuckies into the pan. That's why we change
oil regularly as it also allows condensation into the pan.