OK I took some measurements on the main hull:
Hull length: 20’
Beam: 31" at max
Height at max 33"

So to answer you question it is smaller then the boats you mentioned.

Here is where I'm starting. In the next 4 days I want to hit the Ft Lauderdale Boat show one day then on the boat clean up the **** area with a molding. The opening will be finished to 24" in the front tapering to 23 " in the back. I'll use a couple of scrap strips from building the hull. Glue them together to get a strip 3/4" wide. Route a 3/4" cove on the top. Run the strip though dado blades to make a step in it that will trim out the inside surface. Use a round over bit to fare the inside bottom and fare into the side hull. Once all of that is done glue it to the opening and glass it in place to be ready for the final layup. If I have any time left I’ll continue to fare out the deck and the skim coat on the foam on the port hull under the chine.