A body shock tower repair or replace

I have a 72 dart that had a 383 with fenderwell headers and apparently they had to cut out a portion of both shock towers to make them fit. The passenger side had quite a chunk taken out of it and the tower is a little shakey to say the least. What I need to know is should I repair or replace the shock tower. My first instinct is to repair it by welding in a steel patch. Any thoughts or suggestions will be appreciated.

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At the very least would be to repair the tower and get the strength back. Not knowing if you plan to replace the inner fenders or additional support by way of tubing, I believe they will need help along with the front frame rails.