Deutz engines in Iveco trucks and diamond reo trucks

I was a partsman for 35 years in 1985 I had experience with a Z100 iveco with a blown engine we wished to rebuild this engine but parts were not available so we had to replace this engine the engine was a 5 cyl model 912 which we purchased from a supplier in lakeland ,fl this same supplier said that Deutz engines were also used in diamond reo modlel C116 but they used 6 cyl model 1013. I cannot find this information listed anywhere so I thought I would pass this on to who ever reads this post.