I have a '73 W100 and when I bought the said it had a Dana 300 transfercase. It really has a NP205, which I'm fine with. I'm just want to know whether or not it is the original or not. I leaning towards not because the axles it had locking hubs up front and had 5x5.5 lug pattern, which are characteristics of a '80's W100. Let me know your thoughts.