In 1978 the 1.7 and 2.0 litre O series engines replaced the original 1622 cc and 1798 cc B series petrol units, while the 1798 cc B series diesel stayed put. The range was redesignated accordingly: vans: 200, 230 and 250; pick ups: 230 and 250; minibus and crewbus: 250 only; chassis cab: 255 only. A few months later, the Sherpa was rebadged as a Morris. In 1981, BL created the Freight Rover division as part of the Land Rover group, so the "Sherpa's" badges were changed again.