I think I see a hole in the trunk lid. Is it a luggage rack or rear wing car?

Maybe some bracket (or some home made one) wedged itself between the outer skin and under-structure.

Those symmetrical holes on the frame rail are strange….are they the same on both sides?

With both fenders being replaced are their traces of collision repair up front? Most likely should be with both fenders getting changed at same time…. Wonder if those holes are for a frame machine hookup?

Looks like a Southwest undercarriage. Very little rust underneath.

Is this an LA built car? I see some darker black overspray on the spring perch from the pinch weld blackout. But the frame dip color reminds me of black primer LA built cars (vs grey undercarriage primer)