Everyone has been great in providing possible solutions: Thanks guys!
Here are some of the things I've tried {in order}(1). cut transom to allow full air flow,see pic. result: nada. (2) cut down an 18 x 10 prop to 16". result: not enough thrust to move boat on land, still walks on water. (3) mounted a 16 x 10 3 - blade prop, result: same as #2. (4) re-mounted cut down prop and turned engine on axis 12 deg. result: nada (5) remounted 3-blade prop and left engine turned on axis, result: snake eyes. (6) mounted the new 18 x 12 prop, returned engine to original position, played with the carb to gain some rpm, engine now runs up to full rpm with no bogging out, result: it goes really fast, but did not cure problem. (7) took out rubber engine mounts and made it solid, result: no change. I weighed her on a very accurate digital scale, she is 28.45 lbs. Is that too heavy? could the weight be an issue? It is a big hull, 48" long x 26" wide. It's heavy...ergo, I need a lot of thrust, lots of thrust leading to prop walk on water because of the torque needed to push such a monster?

Does ANYONE else have such a problem? Do you guys even have just a little bit of a problem with prop walk, or am I alone here?

Maybe a longer (not taller) rudder on the right??? I'm fishing here people, grasping at straws,, etc,etc,etc.