Engine height question on Classic 23"

[EagleOCNJ]

My transom was raised from original a few years back, I am removing 25" shaft twin 150s from the boat. I bought a 25" shaft 250 etec for a single application. I am going to adjust the transom to make this work.

My question is for those that have a single engine on a 70's 23 potter hull. I have read for hrs via google search and learned that the starting point is the cavitation plate being level with the bottom of the hull. Many state that the plate being 1" inch higher is often best.

What are the board's thoughts specific to the 23 potter hull sea craft. This will help me greatly and save a lot of figuring. Also, SS 4 blade prop thats on motor already will hopefully be used but dont know the specs of it.