Well, logically, you're going to get the same amount of
oil to both sides, so if one side gets flooded, they both should get flooded.
If you have an intake manifold that was not machined correctly (happens often), then even the best intake gaskets will not help you. Remember, the FE is special in the sense that the intake ports have
oil all around them. If there is a slight gap or the gaskets are not doing their job, they can suck
oil.
I've used about every rocker combination possible and I always restrict oil to the top end, either by something in the block's deck, or more commonly, something in the feed hole to restrict it.