The '67 cowl tags contain info on some options. If possible, get a picture of it before you go and decode it here. Look under the 1967 section before you get into the forums.
The drive to get there is considerable, I would want to see probably a hundred photos including many with the car on a lift. Rust and rot can still be hidden by artful picture taking, but it will still give you a better idea of what you are walking into.
1968 400 Coupe, verdoro green, black vinyl top, auto 1969 GTO Judge coupe, Carousel Red, manual 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver), Fire Red, white top, auto 1972 Buick GS Stage 1, Royal Blue, black vinyl top, auto