I had a '95 740 back in the day. There was some concern at the time over the Nikasil bore plating, that could have problems with the high-sulfur gas of the time. It wasn't a common issue, and was most likely in engines which were babied which lead to relatively cool engine operating temps, leading to forming sulfuric acid which could erode the Nikasil. Sulfur has been mostly removed from the gas since 2000. Any M60 on the road today, would have long ago exhibited signs of Nikasil erosion, if there were a problem.
Nice ride. Take her for some rides in it.