Early A body bucket seat interchangeability

cudamark said
Just about any seat can be modified to fit, but, as a bolt-in....the '67 up ones won't. '63-6 might, but, I don't have any first hand experience with that conversion. '63-5 are a slightly different width (wider) than the '66 seats due to the first year console option in '66. You will probably have to drill new holes for the inner seat tracks. I don't know if they come with both sets of holes in a '62 model. I would bet that it doesn't, and probably not the reinforcement plates either.
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Good information. I asked a nearby seat seller to measure front to back and side to side on his seat studs. The pair he has to sell are from a '65 Barracuda. Matthon just repaired his floor pans on a '62 Signet with factory buckets so will ask him about measurements, but they may have added the extra inner holes and plates for the buckets at the factory when a bucket seat programmed body came down the assembly line.