if you want to change the color, a wing off is the way to go but unless you have a trailer is better to do it where the car will be paint, as you have to remove the windshield and almost the complete interior + front and rear wings in the engine bay except the bonnet you have not so much to remove. Usually when you this better to have several carton like : front nose, interior, rear, windshield and so on, so when you reassemble the car you know witch part is and where that go (especially for the screw)
I don't think you can find a tuto for a Morgan but for many car for sure Youtube will help.
