Hello Nick
Indeed, the first 3200 vehicles had de "wide" body and from the 5001 st vehicle they started to make them waterproof. Some of the "older" models were modified.
It is indeed interesting to hear that there are wc51's!!
Until now i also heard only of wc 52's.
Do they also have the Canadian engine?
Which are the differences on your Dodge?
Perhaps this is a interesting site for you:
www.wheelsofvictory.com
greetings
Kenny