Rear Frame Rail. Can I weld up this hole?

[hemiorange]

I have some donor rear frame rails (not exactly sure what year car they are from) and wondering if I can weld up the hole that I've marked on the photo as it's needing rust repair on both rails. If it isn't needed for a '70 dart swinger, then I'd sooner close them up then recreate them.

 

[Sedanman]

If your not going to need it then yes, but I would blast it clean first. That looks like a 73-up rail and the hole is for holding the bumper shock

 

[cannucky]

Sure that isn't the hole for the exhaust hanger ? that's where mine bolts in .

 

[CudaJunction]

Exhaust hanger is in the rear of that hole .

 

[AJ/FormS]

Why fill it at all?

 

[Snake]

Why fill it at all?

YA I am with you. why what you reason???????????