Hi all.
From looking at pictures, the heads coolant intake is by its rear end, -about 3 inches x half inch ? behind chambers 7 or 8-

What is the size on the coolant passage exiting the head, and where is it located ?
Thanks

 

Out thru the intake manifold and the hose port (#17 in attached drawing) is located at the front. Various models have other small ports for heaters, etc. The heads to manifold water pasages are the corners. See pix of valley pan gasket. They are known to leak because Bozo did not tighten the rear bolts, some have been reported finger tight.