Leaking aluminum Mopar valve covers!!!

I have the same valve covers, using Fel-pro re-useable rubber gaskets.. after installing my new engine I noticed a major leak on the rear of the passenger side cover. After reading the thread on PCV use, I drilled out my cover and added a PCV connection on the passenger side, and a twist on breather on the drivers side.

After starting the engine the leak seems to have gone away. All I can figure is that being a tight new engine it was building up a bunch of crankcase pressure and it was forceing it out at the valve cover. The PCV and breather should eliminate this excess pressure..