There are patch panels available for that inner cowl panel. You're on the right track there. Cut out the rust and weld in new metal. For the A pillar (below the hinge pocket) scrounge up a small piece of 16 gauge steel and cut a piece to match what you cut out to get to solid metal. Butt weld that in.

As far as the rugged weld between the A-Pillar and rocker panel, that looks pretty typical for the factory welds. I had my cab sandblasted, and there were still pockets of weld flux in those weld joints. Not quite birds**t, but close on the weld quality. If it's solid, a little filler will make it look pretty. Or like bartamos said, dress it up with a grinder.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.