I came across this site with kits to chip almost any ECU diesel that is installed in a "boat." It has an explanation just how it does it and comes with all the hardware to do a simple plug in installation.
Just enter the engine, type of marine installation, year.
powered by Detroit Diesel engine 6V92 MAGNUM EVO-Tech Yacht & Marine... (http://www.magnumtuning.com/en/detail/evo-tech-yacht-marine-performance-chip/powered-by-detroit-diesel-engine/6v92)
Might mix well with a resonator.
Pierce