i would get online like ebay and clist and check some prices of what people are asking for similar condition cars, roughly in the same year. a low mileage original like that is worth something, but its a real niche market. check kelly blue book and nada and like hagerty for values and appraisals.
that 455 was an option in that car, so thats a bonus for a collector..and it runs strong cuz its a hi compression no smog engine...
