Welcome Trevor,
AHHH... the '55 2nd series NAPCO with the Rockwell transfer case! You WILL have lots of fun with this truck, (and after it is on the road) more questions from admirers asking what it is!!! Believe me.......... I know..... I own one! A good handful of NAPCOs out there but they have the Spicer set up.......Rockwells are few and far between!!!! Good Luck with it, and if ya have some questions, send me a message. More than happy to help!