I didn't think GG had started selling misinformation about trucks. Somebody, maybe Detroit Muscle or Vans, just spent years compiling a truck fact book that's worth tracking down. For now, I'll just say don't think about it the way you do car fender tags and build sheets because the truck side of the house worked differently up until at least the mid 80s. Everything starts with a T.O.N. (truck order number) which is exactly like the order number on the car side except that it shows up on the fender tag. No clue what went down the assembly line with the build in progress but I've never seen a car style build sheet. The thing ya did get was a "Equipment Identification" label on the bottom side of the hood showing all the option codes installed w/ handy english translations. The T.O.N. may also appear on the door jamb sticker.