Thanks guys. In another thread i started about trim codes on a 56, someone posted a link to a body by fisher tag, simmular to those found on the passenger side firewall under the hood of GM cars, like on my elcamino. All the vehicle's trim codes and options are listed on this tag. So If trucks dont have this tag, is all the truck's info stamped on the door post data plate? Im still stumped on what trim 234N means.