Hello I just purchased my 72 NYB Coupe and am looking for some insight on how to go about repairing this rusted out area. This is the only area on the car that has rot otherwise it is a very clean solid car. This picture is on the drivers side below the door. There is a rubber bushing under one end of this rail. Is this whole piece replaceable or repairable? Would one call this a subframe rail? I'd like to know how deep in dirt did I dig myself into or if this can be repaired easily.