When I was stationed at Andersen AFB Guam and Pease AFB NH (both SAC Bases) the alert flight crews used those 4 door Dodges since they'd hold each plane's flight crew for the B52's and KC 135's. When I was at Da Nang in 71/72 our section also had one for shuttling 6 people around. IIRC, granny 1st gear; we always started out in 2nd. Ah the memories!
Since the replacement cab is a standard 2 door even with the long bed there will be a space between them, so I plan on taking the front of an extra bed to make a tool box to fill the gap.