X14 rare option code?

[68 50th]

This is from a 1970 C20 Custom in Sweden I looked at last weekend.
It was sold as a new truck in Sweden and maybe there is some other options than the X14 Export Preparation that is rare.
It is a C20 and it have coils in the rear, I belive I´v heard only the C10;s came with coils and C20;s with leafs.

I tried to post a picture of the glove box door sticker in this thread but I´m not sure if it will be attached.