360 head gasket blocked ports???

Asked a reputable mechanic that exact question once, he told me block front side even bank; 2,4,6,8 that leaves the open water port in back on that side which is the very back cylinder of the block, he said if you have your open water port in the odd side that the water would not circulate to the very back of engine. Made sense to me. Would like to hear other feedback on this.