Actually I contacted a fellow who advertised a seaplane conversion on
Ebay for high wing twin engine aircraft. He then mailed me some
information. It was basically adding a hull to the bottom of the
fuselage and attaching a couple of sponsons on the wings.

I have pictures and a set plans of a Cessna 150 conversion so it's
possible… just not probable or practical I think.

Now to find a pair of 12,000 amphib floats kicking around for less
than the price of a house. That would be neat.

Bill