Anything can be repaired with the right amount of effort. The question is what caused it and is there any deeper damage? That will frame the effort vs cost. Generally you need to already know someone who can fix that stuff or know how to do it yourself.
Short answer is yes in specific applications.
If you were to have a shop mill the intake casting off then the heads could be used with the Weber carb or fuel injection manifolds made for those modifications. Those head modifications are largely unproven in aircraft, and there is some theory that it weakens the heads and allows for compression leakage.
The alternative is to have a shop TIG weld them back up. This requires a fair bit of talent and time, which will likely cost more than replacement heads.
These heads are common enough and cheap enough to not bother with these sorts of things.