Ford decided not to renew its cooperation agreement with Motor Ibérica in 1965. The new partner became Massey Ferguson, which acquired 32% of Motor Ibérica. However, production of the Fordson-based models continued, and the new models were also based on Fordson technology, although the design resembled Massey Ferguson's style. The first was the Ebro 160 in 1967. Compared to the Ebro Super 55, the differences were mainly a more powerful engine and a dual clutch. In 1969, the Ebro 155 was introduced, which was even closer to the original Fordson.

In 1968, the Ebro 183 was introduced, featuring for the first time a Perkins engine: a 6-cylinder, 82-horsepower engine. This Spanish 5.0-liter 6.305 engine was not used in other tractor brands. The transmission was still from Fordson but reinforced where necessary. The dual clutch was standard. New features included power-assisted steering and a weight transfer system based on Massey Ferguson technology.

In 1970, improved models 155D, 160D, and 684 were introduced, the latter replacing the 183. These models had angular fenders, a new front axle, a padded seat, and key ignition start. The dual clutch in the 155D and 160D was still optional. Faster gear ratios for road driving were also available as an option.

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