Oliver used the Lanova cells right up until the last 1555 diesel in 1975. The first tractor with a direct injection Oliver/Waukesha would have been the 1750 with the 310 diesel. Some of the early 1750s were 1800s that were updated, so there might be a few out there with Lanova heads.

Of course, if you want to get into the third party engines like Perkins and GM, then direct injection came back in the 1950s.