Inner Fender Replacement -'72 Valiant
Use a spot weld cutter for the spot welds. It will leave enough material behind to weld the new inner to.
Hammer and dolly any surfaces straight that dont mate up closely. Use lots of clamps/sheet metal screws or clecoes to secure the inner before welding.
Measure twice and cut once!!! Trial fit everything before welding. Much easier to not grind all your fresh welds off because you welded it on in the wrong spot. Take your time,it's not a race.
If in doubt, ask questions or get help.
Grind all weld surfaces clean. Dont sandblast,it will contamintate them. Use a good weld through primer.