Cheyenne but can't prove it...

[Drive-In 4x4]

Hello I'm sure I'm not the first to ask this but what do you do when glovebox sticker is long gone.... No build sheet? Is there any way to find out what your Truck was? I'm fairly sure it was a Cheyenne it has the parts and they are old. Original paint and no signs of mixing and matching parts. Lastly is there some tell tale other ways to take note of to determine genuineness? I think it is real but not the top of the line but a basic Cheyenne. It's mine and good Lord willing will be nice someday soon.... Thanks for any help I can get on the subject.