Welded combustion chambers?

I know the other heads would probably work for less trouble, I'm just interested in being able to re-work the heads for the sake of being able to do it. Furthermore, I've got a slant six head that may react favorably to this sort of treatment as well... Besides, If I can do this kind of work, I'm sure there's work for me if someone else wants it done. ;)

Interesting is there any info on the spray welding I have access to a unit at work id love to try something on a slant head if somebody would or could walk me through it
Aaron