Valve Cover Oil Leaks

The trick is to glue the cork gasket to the valve cover.
This is usually where the gasket leaks.
Before you start take a ball peen hammer, and tap the bolt holes back out from the bottom.
You want a smooth, flat, clean surface.

I use Edelbrock gasgacinch.
Put glue around the valve cover mounting surface, and the one side of the gasket.
Let them tack up for a few minutes, and place the gasket on the vc.
Use your fingers to press the gasket and vc together, going several times around the gasket.
After the gasket is on, you can lay the vc on a bench, and put a small weight on top, and let it dry.
Now you have a gasket perfectly sealed to the vc.
After that put it on the motor dry. Torque down to the proper spec and order.

Done.
:)