Seat measurements needed

original style bucket seats with original style rails or aftermarket everything? There should be divots on the floor where the factory would have drilled out and mounted buckets if they had been original options. FYI they do end up placing the steering wheel much closer to your chest than modern cars and the large diameter steering wheel can make it feel like its in your lap. When I put my buckets in I mounted my rails to the floor in the factory locations but moved the actual seat back about 2 inches and my sliders are adjusted all the way back and I still feel closer to the wheel than on any modern vehicle but its driveable.
Pictures of what you have can help