Welding the Backing Plates

[quick60]

The backing plates on my Dana 60 have grooves cut into them where the edge of the brake shoe rides. Can I weld this up and grind flat or should I replace them?

If replace, where can I get them? I have tried LMC and other popular after market maybe I just missed it.

Also what brake hardware kits fit 67 GMC 3/4 ton with leaf. I only see 67 3/4 ton with coil on LMC. Ive already ordered wheel cyclinders only to receive the wrong ones cant afford to keep working this way.

Thanks!!!