Break In Disaster????????

I just read through this thread and thought I would not my experience out there.

You oil pressure sounds completely normal to me for a stock pump. Every small block I have built started cold at 80 or so psi and idled around 40 to 50 warmed up. Still can reach 80 when throttled up.

As far as your oil coming out of the rocker shaft bolt. Lots of good advice here. Definitely clean the insides and inspect them. Make sure the bolts go into the threads smooth and the length is proper. Aside from that, I have not watched my valve train for oil coming around the bolts so I do not know what is a problem and what is normal.

On your oil leak, I prefer felpro gaskets. I do not use a torque wrench and tighten them by feel. I dont use any silicone. Make sure the flange of the valve cover is streight. Check for cracked corners of the valve covers. Verify the leak isn't something else. Check the back of the intake and distributor o ring. Make sure you clean your oil off the engine completely. The leak could be fixed and you are seeing old oil dripping from under the vehicle.
Good luck