Might I have a copy of a buildsheet from some on this forums car? Could be but considering the millions of Mustangs built is a long shot.
Where they placed the buildsheets appears to depend on where the car was built. In 69 they have been found (in no particular order)
Under the carpet underlayment (these are the ones seen covered in tar )
Between the engine compartment wall and fender
Between seat cushions and seat springs
Behind rear quarter panel trim
As you look kep your eys out for any papers, From time to time you will find inspector forms/sheets. Found these under seats, under carpet and under headliners - shoved in the edge
Jeff Speegle
MCA Shelby Gold Card
http://www.geocities.com/MotorCity/6473
Mustang & Shelby research, documentation
http://albums.photopoint.com/j/View?u=1609818&a=12284202&p=44925357&Sequence=7&res=high.jpg