Wow. I had to do some page flipping and research a little to be sure of what I was going to say but eliminating H13B is the rear, or aft if you want, part of an enclosed cabin areaaft of the helm control. So you may want to rethink that idea.
The port holes can be installed and then covered/sealed on the interior for water integrity and painted white on the exterior thus appearing to have curtains over them. Or omitted as you like.
Lots of parts probably aren't going to fit, as you're finding out. Sort of like a Dumas kit; they either don't fit or aren't any good and have to be replaced or re-engineered.
Your foredeck looks great! The wood grain looks nice so a stain would look good. I like veneer, but that's me.
Bob