Twin inboard gas to single diesel conversion

Thinking about converting my 28 seabird sportfish (twin 225 cryslers) to a single diesel.Has any one done this or could recomend what type of horsepower would be compatable in a diesel?The boat weighs about 10,000lbs and cruises at around 20kts.The chryslers are coupled to v-drives, if changed to a diesel should I use a single V-drive to keep the weight in the rear or move the engine toward the front?I would assume a single diesel strait 6 would weigh as much as the two 318 chryslers.Any advise would be appreciated, thanks.

-Glenn Burgess

 

You can find aluminium alloy diesels. steyr make them and I think they would be light compared to some old chryslers.

You could also convert a turbo diesel from a car with aluminium block.

I don't think you wil have problems finding a aluminium turbo diesel with the same weight to power ration as a normaly aspirated gasoline engine.