[dataway]

Look at the rear wheel wells. The bevel where the trim usually fits is gone. Either cut out at some point for big tires ... or more likely the whole wheel well was reconstructed from bondo.
For some reason I have a feeling the body and frame weren't born together. Body looks like it's had extensive rust repair but the frame looks solid. Rear window frame looks rusted out, rear quarters behind the wheels look all wrong to me.
Frame looks too good to have lived most of it's life in Indiana and Illinois.