Inliners International Forums General Discussion Engines GM 4 cylinders 151 153 181

I was just going through the new Power Manual and was looking at the hybrid heads. What head is that Mercruiser in page 185? None of the 153 or 181 Mercs I've seen are cross flow. It is not like the Iron Duke. Funny I didn't notice that in the old book. That would be another option for the L4s. Leo says the bolt pattern is the same.