Any one know what this package is?

[koolky]

When I bought my 70 Longhorn it came with this package, It shows all the dimensions for C20 and K20's, pickups, Suburbans and Panels. Its dated October 1969. I was thinking it was a Canadian thing because in the same package was a leter from GM Canada dated 2003. It lists all the original specs... Its prety cool, tells me When it was made, shipped, to where, to who. Ill post a picture later.