Help? how high should i make the floor so it will be self bailing

[tsubaki]

Best I can tell on mine, the water line is at the floor level but I'm gonna have to get a couple of long straight edges out to really measure it.
That bracket addition should make it squat even lower in the rear. But you are changing a whole lot (weight distribution wise) getting the saddle tanks out and putting the fuel cell in the C/C.
Hows about thoughts of a bilge box also to catch excess water just in case.