Need lots more information such as original options(400 or not, mqnual or auto, original color/trim). All of which is less important than the fact that it is apart right now.
By your description, even at 3-4k, I think you will struggle to find a buyer wanting to take on a project. There was a thread in the '68 section for a car in the Dayton area. It was much further along if I recall coŕrectly. And he was down to 4k in price.
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