Thanks for the responses and no offense taken. I believe I have an Indmar 325 Assault in my boat, I was basically wanting to get the hp and torque of the 340. I mostly wakeboard behind my boat and I feel as if it has plenty of power to meet all of my amateur wakeboarding needs. Since I had to replace the block anyways I figured why not see if I can get a little more power while I'm at it. I am curious about the transmission as mentioned by mmandley.