Engine bracket or no bracket on an 18 rebuild

[Johnlupo]

My son and I are in the process of rebuilding a 1976 18 seacraft. The boat was in amazing shape but one thing led to another and We ripped everything out. Now are considering closing in the transom and adding a engine bracket. I have seen a few rebuilds that they did it but am concerned about the boat having trouble getting out of the hole and porpoiseing. Just figured I would ask guys who have more experience than I do. Thanks