I modified the shock tower on the Hemi Dart clone I am currently working on. I would say that is the easiest fix in the long run. I hammered the tower back as far as needed to clear for valve cover removal. Then I cut out the damaged sheet metal, welded in new flat metal, then metal finished to clean up the welding. I also moved the shock mounting hole outboard 3/4". It ended up looking stock with necessary clearance to remove valve cover when needed. If done right nobody can tell from stock. Good luck.