I am looking at purchasing a late '80s 55' ocean with twin detroit 8v92 turbo 735 hp. I know detroit makes solid engines (I have 6-71 in my 43' and love them) but i am a bit concerned with that engine at 735hp. Anyone have approx life on those engines? Boat weighs 60,000 lbs if it matters. What is involved in de-tuning the engine to lower Hp and extend the life a little? Can i simply put smaller injectors to lower hp and increase life? I could so take the turbo out and replace with a blower but im looking for the cheapest and easiest solution. Any input on these engines at the HP would be great. If anyone has any experience with the boat your opinion is also appreciated. thanks in advance.