I've got a head for an M42. has a couple bent valves. I don't know which ones however. The head has been surfaced, pressure tested, repaired -- the whole works. When I got it all put back together, the tensioner failed and the chain jumped-- presto -- some bent valves.
I'll let it go pretty cheap. It's got the cams still. No sprockets. $100 OBO picked up locally-- I could ship it if necessary, but it would be a little spendy.