Brisket sausage at Longoria’s BBQ in Everman. On a recent weekday afternoon, Marshall Cooper and I dropped in at Longoria’s BBQ in Everman, one of our favorite DFW joints. We met pitmaster David Longoria at the cash registers and started to talk BBQ. The lunch rush was over and were back in the pit area in no time. The trip was nothing big, we’d already eaten at two BBQ joints in east Fort Worth that day, Uncle Willie’s & Mama E’s. But we still had room, if you know what I mean. Longoria’s pitmaster David Longoria meets Posse pitmaster Marshall…