I taught a VERY heavy gent to fly floats in his bone stock Sedan many years ago. I’m talking heavy. That thing did incredibly well, better than a stock 170B, and no flaps.
A year or so later, I got a guy float rated in a 360 powered Sedan. Incredible!
At the time, I was flying 185s for work, and I’m convinced the Sedan has more room in the front seats.
They are floated properly (barely) for the legal gross, but itd be easy to overload one with a 360.
MTV