My dealer expertly built up my transom 2 inches with a large black steel plate. I was very pleased with the look and finish.
Unfortunately,though the problem is a little bit better, as I accelerate from a plane, the bow still digs down and I get lots of spray from the sides of the boat and she bow-steers to the left and right. It's impossible to get the boat to go straight. So though it is a little bit better, it's still a huge problem.
Plus ... get this ... now my engine cavitates/ventilates just going in a straight line on a slow plane and immediately as I make the slightest turn.
So the motor has been raised so much that it's cavitating/ventilating, and the bow-steering problem is not solved, which tells me that this is an inherent design flaw in the boat and not due to transom-length/motor-shaft-length mismatch.
My dealer could take out the plate that was used to raised the top of the transom and place it an inch lower. That would probably get rid of the cavitation/ventilation, but to what end? The boat is no fun with the bow steering problem.
(And yes, the boat and keel are properly inflated, changing the trim pin position doesn't help, and there is no weight in the boat to distribute, to anybody who might want to bring those up again as possible explanations/solutions)