How deep is the induction hardening on magnum heads - can I do a valve job?

A plow truck sees a LOT of loaded, low RPM time. Just the type of operation that needs hardened seats.

I love posts like this where people always want to do a job on the cheap but what they need is the exact opposite. What difference does it make what the truck's worth is as a static hunk of metal?

What's it worth as a good operating plow truck?

All this talk about "it's not worth X, so I am not putting Y into it makes no sense to me.

Either fix it right, or throw it in the ditch.

I don't disagree with the "fix it right" part, why do you think I asked how deep the induction hardening goes??!! if it goes a hundred thou deep, I'm not throwing my $$$ away by installing seats! If you KNOW the answer to my original question, please state so. But you didn't even attempt to answer it.