This may be worth a look.
https://www.facebook.com/marketplace/item/771933138094316
“1953 Round body Willys jeep (M38A1) Was restored at one time, has sat for a while. Needs motor work but is An original sleeved motor (4 cylinder) the doors are also pretty rotted”
The classic wooden doors, I have researched them several times but never came up with an answer as to why they were used.
Mark, I have not encountered a reason for the wood doors either. Cost? Ease of manufacture? Disposability? It is so odd that I imagine there was a purpose behind them…