S/B stroker block prep
That pic from summit was only an example.The one from SD is similar. It was used on a Craftsman truck engine. the water exits either side of the pump (on the outside), and is directed to the centre frost plug hole. This seems to be the accepted manner. Heads coolant is much more direct this way. Much the same way as my W7's, coolant enters the head from centre and below, than exits the head from 3 holes per head. This coolant thing is a whole new frontier for me. I suppose if I wanted to get funky, I could exit each head via the casting hole, but I doubt there'd be much gain from that exercise. Scroll down near the bottom and left side.
http://www.shadydellspeedshop.com/w5.htm