are there any VINs stamped into the back half of the truck?

[Pete M]

wanted to include my trailer in our VIN registry and figured to ask before I go crawling around in the dirt on a wild goose chase rather than after. 

[Strokermjcomanche]

I've never seen one back there , at least there wasn't on my 88 when I had it completely torn apart . There was part numbers stamped in the metal though .