Since Morgan cars are also dear to my heart, here is a video I stumbled across giving a rough idea of how they are constructed. I had been to the factory back in the mid 80s and while there are a lot of similarities between now and then, there are some differences. These mainly being to protect the car better from the elements as the old ash frames had a tendency to rot.

https://www.youtube.com/watch?v=p4c9i250pc4#t=507