Looking for 1969 Plymouth 'Cuda 340

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So I'm guessing your old cuda 340 was an A56 optioned car? That detail would be on the fender tag, but you would need the complete vin to best determine if there are any matches out there.
Back in the early 70's I never thought to keep anything with the vin number on it. The best shot of finding it is through the county where I lived if they still have records of taxes payed stored somewhere. Their computers only go back to 1996 now. I am going to contact them to see if they can help me. I am putting a picture of a model I made as the car looked like in 1973 when I sold it back to the Plymouth dealer.