Just checked the BGE block I have on my shop floor right now is 1.5 inches less water jacket depth than an early or late 5.7 blocks I also have sitting here. Also the bores are siamesed about 1/2 the distance up VS the 5.7 bores not touching each other the entire length of those longer water jackets.

I am not causing global warming, I am just trying to hold off a impending Ice Age!