I want to go the diesel route when I repower my 36'. I would say it will be a couple years before I have the extra coin to go down that road.
I would be willing to be a guinea pig if you wanted to dump your package into something to see how it works. To me an Apache would really appreciate the torque of the diesels because it is so heavy and requires so much HP in a gasoline application to get it going. For me Something that cruises nicely is way more important than top end.
I would love to see what you come up with.