I would say the frame is '83ish, it lacks the small 'rings' at the ends of the decals that go around the frame.
I agree with the frame only purchase or parts were switched out by one of the previous owners.
what page is this bike on in the catalog??
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk