How deep is the induction hardening on magnum heads

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

MOPAROFFICIAL said
The factory induction hardening surface is about as thick as your foreskin.
:welcome:
Have seats pressed in, do the guides and get a valve job.

Uhhhuhhhuhh, Beavis!
You said ''hardening'', ''surface'', ''thick'', and ''foreskin'' in your first sentence.
Then you had ''pressed in'' in your second sentence.
Uhhhuhhhuhh!