The 970/9070 never had a cummins. it was the 9060. the i heard was, the 8.7 in the 960 didnt meet the emmision standards anymore so they used the cummins. But didnt iveco have the 9 litre yet at that time?
Had a 960 with an Iveco and was happy with it...went to a 9060 with a cummins and totally hated it...the cummins sucked way too much fuel and was underpowered, as well as dropping a valve with only 150 hours on it!!! Traded back to a 9060 with and Iveco and am much happier!!!