There is a old trick that I read about from Paul Rossi. He would drill a hole to make a water port dead center in both the bottom of the head and top of the block. In the article he stated that MP did in with some heads used on motorhomes.

He had pics of the Motorhome head and the ones that he modified to match. I did that mod to my eddies too. I may still have that artcle around. I dont know how well it works though. But Paul did recomend it. mike