Inner rear quarter panels

My 65 valiant convertible is super solid and rust free excluding the lower rear quarter panels. I purchased replacement metal for the outside but the inner metal is rotten out too.
There is a vintage car salvage yard near my house with half a dozen darts from the same era but no valiants.
My question is, will the dart inner wheel well area and lower inside quarter panels work to repair the rust damage to my vehicle?

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