Hello, I am new to this site and was wondering how to find info on a first series 1955 GMC truck. It looks like a 54 as far as I can see. It has a automatic trans that does not have a Park just N D and R. I am thinking this is unusual most of them had 3 on the tree or 4 on the floor with Granny gear. With this being a first series is it hard to find parts for? Thanks, Mark