Its one of the high performance engines that goes in a 657E scraper. 3412 maybe? I'll have to look on my laptop when I get to work on Monday. The techs have access to the "high performance" stuff as well, your average 3412 won't run that high, I just rebuilt it, dynoed it, and ran for 3hrs and RP was anywhere from 38k-42k. Twin gigantic turbos. Made around 5000hp at 1500rpm.
This is another topic but there is no way a 3412 made 5000 hp
Hot rod 3516 in gen sets don't make over 4000