What exactly is the foam for? Foam in the hull does absolutely nothing for you from a floatation standpoint when using the boat, because it does nothing to increase the displacement volume of the boat. If you and I have identical boats, and your's is filled with foam and mine has none, mine will sit up higher in the water than yours. If we dump 20 gallons of water in mine and twenty gallons in yours, mine is still going to sit up higher in the water, because the foam is only additional weight at that point. Decoys float, but if you have a couple of hundred in the boat, the weight of the decoys will make the boat sit lower, not higher. The only time foam will help you is if the boat gets a big hole in the bottom, or somehow takes on water until the water from the lake starts pouring over the sides and the boat is essentially completely submerged. However, it only helps you at that point if you have enough foam in it to displace enough water to support the entire weight of the boat, motor, foam, battery, etc?.. If you just have a little bit of foam, it is still going to sink just like it would if it had none. In your case, since the foam is loose and not sprayed in, the wood floor and boxes will have to be strong enough to support the weight of everything, without breaking, detaching, or having the screws pull out. It is your boat, so I'm not trying to tell you what to do, but I just want to make sure you understand that foam isn't going to make it float better. If you are set on putting foam in it, PM me the weights of the boat and motor and I can give you an idea of how much foam you are going to have in it to make it unsinkable. I will help however I can. I can tell you though, that it will be a lot of foam. Theres a reason those pieces on the bottom of floating docks are so big.
Ok, got it from my phone. I think he assumed i had the wrong idea for the purpose of my foam.
This was my response:I see your point, jump in a pool. Then jump in same pool with a pool noodle between your legs. I bet you float better even though technically you weigh more with the foam 
The foam isn't to help the boat float higher or better, simply in there to "help" in the event I take on water. I've seen a chart on the foam/weight thing on another forum. And Ive seen someone break down the pink foam in some form of a calculation to describe how much of that floats what weight.
This stuff is a mere added help to get me to a shoreline worst case scenario, not to fill the boat with water and think it's going to hydroplane. I appreciate your offer to help out. Figure the boat around 1200lbs loaded people, gear, motor and all. I'll try and find the other info I mentioned.
