I'm in the process of restoring a 1976 Dodge Dart 4 door sedan. Currently, I'm confronted with a rear frame rail issue. The back of the driver's side rear rail is pretty much gone. It's all still there, but when I pick at it, it pretty much just falls apart. This is only on the very rear of the car, only starting about halfway between the back of the wheel well and the back of the car. Forward of there, it's still good. Would I be okay simply fabricating a new section of rail, cutting the old rotted section off, and welding in the new fabricated section?

 

Basically you will need to replace everything that is not solid. I generally make my parts then cut out the damage and weld the new in.

 

AMD for some of it.... Like Iowan. Fab the rest !!!!