SO I've identified a oil leak from the head above #3 exhaust port, due to overheating. I am going to pull the head soon, but am wondering just how much it can be serviced before it has to be scrapped. Do I need to start shopping for a new casting somewhere or is there much that can be machined on these things? I don't know if anything has been done to it before I bought the car, when it had just over 100K mi. (it now has 160K)
Any experieces appreciated.

Mitch