Good Morning slomotion,
Both pictures look like the helm area is well done. The second picture is more classic in my opinion. If you are using a kit it could probably be secured to the fiberglass using thru bolts. That would sacrifice the use of that locker (if yours is like the one shown in the second picture). You would need to get a bit more fancy to make it removable. Perhaps hooks, latches, barrel bolts, or similar onto the front of the seat and the locker lid? Maybe barrel bolts into the sides of the wooden seat in the aft most part of the fiberglass seat in the picture? I might be able to find a picture of our seat that was on the 272.