Part of the height discussion depends on whether the boats used as examples have notched transoms or extension boxes.
Those will generally allow you to raise the drive more. Raising the drive that much will probably require the use of a modern 4 or 5 blade prop. Until about ten years ago the best prop we had was the Mirage 3 blade. It had to be run very deep. That being said, I would tend to be conservative. Raise it 2 or 3 inches and then use shorter lowers or spacers to find where the boat runs best.