I've always felt that GTO, Chevelle, Beaumont, Tempest, Skylark etc seats are all the same other than the vinyl pattern. (Not sure about Parisienne though?) Assuming this is correct, I would think that if someone is looking for buckets for their '66 Beau, these along with a new vinyl Chevelle kit would translate to an authentic end product?...
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"So when you spot violence, or bigotry, or intolerance or fear or just garden-variety hatred or ignorance, just look it in the eye and think... The good outnumber you, and we always will." Patton Oswalt