Rookie with an engine problem

[Shelby1962]

Just bought a '31 Deluxe that was well restored. When I checked it out everything was fine. Now after the first drive it is pumping oil out of the rear main area and coming out of the hole in the bell housing. The inspection plate was almost dry. I pulled the pan and saw the drain pipe is in place and the engine was just redone. It has a new forged crank,cam, pistons, etc....my question is how can i determine where the leak is? I did not see any gasket cement on the oil pan gasket corners or the main cap. Could it be leaking between the cap and block by the shims? Is it possible pull the cap with the bellhousing in place so I can check the bearing clearance? If it is the rear cam gasket is there a way to check this?
Lastly how do I re-install the oil pump and pan at the same time? is something supposed to hold it in place? it just fell off with the pan.
I'm used to my model T and not this newfangled modern stuff......