The 60 series Detroit engine was the one used in the 2001 Prevost H3 that was the basis of the coach I had built at Vantare' in Florida (a Featherlight company...) for a company demonstrator a few years ago -- very nice set-up. We also had a 12 KWH turbo diesel generator on board that was in a foamed lead enclosure to keep it whisper quiet -- ran all the video delivery fiber optic telephone equipment and satellite head end video compression system we were demonstrating, plus the three air conditioners, etc when there was no shore power available. This coach also had two 4KW inverters so you could run much of this equipment without even starting the generator for a few hours. The batteries for these inverters were connected as 24 volt stacks of deep cycle 6volt units.
This coach had a full body wrap signage for advertising purposes since it was used at national trade shows and conventions for business purposes...it was not meant to be subtle
Chuck