I have found myself with the opportunity to buy this motor that hasnt run in probably 10 years.It has about 15-20 hrs on it.It is in a Sterling Jetboat that Im looking at.My question is,Is there any thing I can do to it to run PUMP GAS? If so,at the same time what do I do to make more H.P.?My plan is to run it in my Jetboat.Hydraulic Roller,or Solid Roller.Can I inslall a Whole bunch of overlap to drop compression or do I add thicker head gaskets to drop compression? Really wanna buy this engine...Thoughts???