What options does my truck have

[oldasi]

Have a '72 Chev 3/4 ton pickup.
The serial number VIN tells me its a V8, 3/4 ton where it was built etc.
How can I get a list of the options that were on it when built. I understand that there was a sticker/label that was on the firewall or door post but over the yrs its no longer there, it has a Long Horn box but could that have been added to a standard frame and not come from the factory