Got one head rebuit at work, but then got side-tracked with another air-cooled engine rebuild....
When I got the heads back from cleaning, I found that the exhaust seats were pounded out pretty well, and fairly heavily pitted. So, I re-cut the valve seats (which are simply machined surfaces on the cast iron head) cleaned up the valves, springs, and keepers, re-cut the valve surfaces, and lapped them in. Installed new valve stem seals, Reassembled the head, passenger side, started cleaning up the pieces for the driver's side.... Still working on the bus at the house, so the only work that's happening on this thing right now happens at work, during my lunch breaks.
A couple of pics:




