Do some research.
I have two sets of sohc valve covers sitting in my garage. One set is off my 03 GT, the other is off of a crown vic. Neither of them have any sort of oil deflection or way to allow oil to drip off of the ceiling of the cover onto specific areas of the valve train.
So with that said how about you post up your research because the proof I have sitting in my garage is pointing in another direction.