Just got the news from my mechanic that I need a new block on my boat. I'm no mechanic and can use some inputs here...I have a 4.3L V6 OMC<br /><br />1 - I was quoted $3900 for a new engine and $3000 for a rebuilt (installed)Are these prices reasonable?<br /><br />2- What disadvantages to I have going rebuilt? I was told the warranty is the same<br /><br />3- What things should I be asking or looking for in a replacement engine?