" I know a lot of the 6.2s wer
" I know a lot of the 6.2s were marine application but do not know what exactly has to be done to that particular engine to convert it. It has been my experience that if you go with a marine engine already converted, it is easier. No jury rigging and replacement parts are over the counter, etc. As far as power, I do not know the HP ratings or RPM ratings on the two engines. Last year I did away with my 440, (300 HP@ 4500 RPM) and put in a rebuilt Isuzu diesel, (206 HP@ 2600 RPM) I changed the drive ratio from 2 to 1 and went to a 1.5 to one and a moderate decrease in my prop pitch. I used to run about 35 MPH and now go 26 MPH but do it on one quarter of the fuel. Yes thats not a typo!!!! I used to average 8 gallons an hour and now average less than 2... Of course less speed, a little more noise and weight , but for a working/pleasure boat it is great. I can cruise at 18 MPH for hours on end at about 1.5 gallonsper hour and the engine is barely working. The best advantage is getting rid of the gas fumes/fire hazard. My suggestion is see if anyone local has a diesel in a similiar boat or check with the dealer to see if it was offered in a diesel version and compare performance. You will lose some speed, gain fuel mileage, longevity of engine, lower maintenance, but at what cost. I plan to keep my boat for a long time so the payoff will be worth it. Good luck and keep me posted on what you do. Hope I did not drone on too long. Kim "