Transom Question

[78V20]

OK I am new to the forum but have a few questions......I just purchased my first v20 it is a 78 steplift 20 ft. I am repowering and was thinking of putting a 200 horse evinrude outboard on the back. I am concerned about the additional weight (Had a 140 evinrude on it) with the transom notched the way they are...I am concidering building up the transom another 5 inches and going with a 25 inch shaft or do you think the weight will not be a issue and just adding a Jack plate with a 5 inch vertical lift will be ok? Thanks in advance