I have never heard of anyone drilling more holes in the deck surface and the heads. It sounds liked you created the problem. As far as the heads, that's a different story, but it's likely not going to fix your problem.
Actually we did it on the 5.7 in the early days.... on the dyno we seen too much heat and were trying to burn up pistons and then it was how big to make the holes... too big and you pull water from other areas.. has to be a balance
