Good on someone for making it run again.
I worked on a job for a customer in Portland OR several years ago. It was a river dredge with 4 ea. 6-110 Detroit engines driving a sand and gravel pump in the Willamette river. The dredge crew partially disassembled and delivered them to us. We rebuilt all 4 and test-ran each one in the shop before sending them back out to the barge. It was the biggest hunk of iron I’ve ever rebuilt and tuned. They were configured as a quad with 1 LH blower with RH rotation , 1 RH blower with RH rotation, 1 RH blower with LH rotation, 1 LH blower with LH rotation. We took much time in marking all components. It would be extremely easy to mix up the parts otherwise.