I'm gona try and cover all the bases here.
Tebo, Yep the valves need to rotate not scuff back and forth as pointed out in parts of 2M's and goodgollyjosh's discussion. I'm with ya. Miles, no I didn't. They should last a long time, factory.
grizld1, These are spares. They are in a V-cover and head set I'm putting on my bike after a shop repair failed. Very much appreciate your offer.
2m, they are in good shape except for the hair line down the middle. (Wonder how deep the case hardening? is on these?)
Anyway, for those that have heard it all; when I put the head together I didn't have a matched V-cover and head set to put on it. I used what was on it. Head was dusty and dirty but not oil stained. During the cleaning, I discovered that some time in the past, the valve keepers on the left rear intake valve departed the groove in the valve stem. The valve spring retainer rattled around on top of the valve before being swept under the cam lobes and driven thru the valley area under the left hand lobes. A shop? repaired the hole ( which evidently did not effect torque of the head or seal of the head gasket) by first riveting a piece of been can in the hole and epoxying over it.
You can't make this stuff up. Mean time, I found and purchased a 77 head set. If the guides are good, I'll just transfer all the parts in my head over, hand lap the valves and I should be good to go. It was worth a try and I may have broken the epoxy loose when cleaning. Look at all the experience I'm getting!
Thanks
Thu