Engines | Mounts, , 1974 DETROIT 6-71 INLINE 71 SERIES, Truck Engine, (GOOD USED) 1974 DETROIT 6-71 DIESEL ENGINE, NATURALLY ASPIRATED, 6L-71N 4 VALVE, MODEL# 1067-8000, 250HP @ 2300RPM, 6 CYLINDERS, SERIES 71, 7.0L DISPLACEMENT, ENGINE SERIAL# 6A311663, STOCK# 2107 TEST RUN & INSPECTED INTERNALLY! WARRANTY! CALL CA TRUCK PARTS FOR MORE INFORMATION (305)688-1101