Front Drum Brake Help - 68 Barracuda

Side-by-side, it looks like the important dimensions match up with your old one. Pad width, overall height, etc.

The double wall on the original allows for better exclusion of water because it creates a better labyrinth. The lip on the backing plate centered in between the 2 walls but now you will only have one path.

If it otherwise physically fits, I would use it. Of course you need to replace everything in pairs.