I would look to install an original, as it would not take up any additional deck space. I had that boat a couple years back and removed the livewell yearly for access to the bilge. It was a simple process including about 6 screws and 2 hoses. If you are looking to add one in the cockpit, I would assume that the boat would not be much different than the original, but I don't know how many gallons the original was. Water is 8 lbs/gal, so you would have to figure that for the additional gallons. My scuppers were not above water, as you could read in many prior threads, many aren't. This usually isn't an issue, and is a non-issue if the scuppers and hoses are in good shape and properly clamped. it only becomes an issue if that is not the case. i would assume you will not be leaving water in the livewell when you are docked and only using while on the boat. I did get some water through the scuppers when I had enough heavy fisherman, all standing on the back. It would drain right out as it should when we re-distributed the weight.