They are a little shaded, but I have seen much worse on engines that runs like a top.
What happens by the valve being slightly masked by the material around it is your flow becomes a little less. You flow less air/fuel, and less exhaust gasses through the exhaust valve because the opening is masked from the combustion chamber.
This is a big deal to guys who push for performance, flow is performance.
For me, my days of driving anything overly fast are over. So when I reworked my iron head, I took one look down the intake port and knew whomever designed that head gave two rips about flow. Matter of fact, peak down yours and stare at the big square wall that separates the chambers. Nothing to restrict a smooth intake flow there........
Mine are shaded more than yours, and like Musky said the next time I tare into the head it will get seats added. You dont want them to go too deep, so I would have a valve job now and plan for seats in the future if I were you.
Lee
