Need little help 340/4sps 70' Dart Swinger

Need a little help.
I'm offered this 340/speed 70 Dart Swinger in partial trade for my '12 Boss 302.
''its supposed'' to be a match numbers car.
Obviously repainted Plum crazy over the FJ6 GO Green
What value in today market this would bring as-is? It would need a repaint and dash is cracked and cluseter chrome trim.
Fender tag, look well optioned.
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