Recently bought a 71 GTX...while looking for a build sheet, I noticed one between the burlap and foam in rear seat back... after removing seat cover and foam I found build sheet for my GTX and a stack of 7 other sheets....sheets are free if you own the car.
WP29G1G177098
RH23G1G178120
RL41C1G179062
WH23G1G178372
RL45C1G177897
WH23G1G178362
WP41L1G179510
WP29G1G177098
RH23G1G178120
RL41C1G179062
WH23G1G178372
RL45C1G177897
WH23G1G178362
WP41L1G179510