Iam in the process of restomodding my 1973 Mach! and already for the first time I have replaced most of the inner fender aprons, front suspension reconstructed the upper cowl, but now I'm stumped with this delema I am enclosing a pic of the left and right hand door pillars the problem is it has somerust damage preety big holes and knowing this is a major support for long and heavy door I have no idea how to tackle this repair. Any information on how should I approach this would be greatly apppreciated.