I bought a very cherry '68 fastback a couple years ago that sounds identical to your car. Mine has a 2 barrel 289, C4, bench seat and was purchased from the 93 year old, original owner with only 91K on the odometer. I paid $7,200 and have not regretted it in the least. I'd have to disagree about the rarity of the bench seat. 1968 was the first year of the bench's availablity in a fastback, and they're quite rare, especially with a deluxe interior. Mine will most likely give way to buckets in the future, but they're neat simply because of their low numbers.