Sure it's removable, so is the aft deck hardtop and probably the flybridge, who knows about clearance, you'll have to take measurements and I'm sure Carver would probably be able to answer your questions.
I have a carver 405. With arch off, hard top props rudders, windshield and helm chair I was just over 18ft of clearance. Don't know it this will help
Sold Carvers for many years. Carver shipped the 450 with flybridge removed(obviously the arch as well). They had a big piece of plywood to cover the open boat for travel. I doubt you're gonna ship it over land any other way. Tried to buy a Maxum 4100 SCB out of New York last year, but it was a nightmare trying to get someone to transport, no matter the price. Cheers.