1968 Barracuda fastback..formula S 383/4spd..Restore or not?

I have seen build sheets on top of the heater box and under the headliner.
They can be anywhere... it was a "no garbage" policy in the assembly plant. It wasn't to help the restoration guy 55 years later. Under carpets, taped to the top of the glove box, stuffed in the headliner, under the carpet, bucket seat backs, etc.