A pillars(upper around windshield)

[westcoastdodge]

hey guys hows it goin,what would be the best way of fixing my a pillars('68 charger),very heavily pitted where the vinyl roof once sat i guess and see that amd do not reproduce these(at the moment) thanks in advance

[GMP440]

  That left side A pillar needs new metal.  See if someone here is parting out a 68-70 B-body two door.  Maybe they will cut out that section for you that way you can weld that on to your car.
Weld two small braces; one on each side of the rusty A pillar.  Leave about 2 inches of space on each side between the A pillar and bracing so that you have room to cut and then replace with a donor piece.
Also, looks like you're going to need to weld metal to that upper part of the cowl.  Right side looks pretty good.  Maybe sandblast that right side fill, prime and paint.

[NHCharger]

If that is the only spot that's rusted thru you could cut that area out and weld a new piece in. Unless that entire A pillar feels soft/punky.