73 Dart A pillar seam

I am woking on the body work on my Dart, and the seam on the bottom left of the windshield was cracked, so I melted out the lead, and cleaned it up. What's the dest method to repair this seam? Fill it with all metal, or reinforced body filler, or weld a patch over it?

Or do I have to lear to re-Lead the seam?

Thanks for the input.