I ordered my boat with a 4.3 V6, thinking I would have better range on Lake Mead. What a big mistake, not only the range is less, but noisey as hell. If I would have gone with the 305 or 350 I could cruise at 40 MPH without noise and go further. Thats one of the reasons for the CTD HO I just bought, getting the most possible available power, so there would be no regrets.