Checking the History, it all gets very confused, the original Engine was taken out in 85, rebuilt and put back in, in 87. During that time the spare Engine was used. It seems the original Engine had it's Head skimmed, and the seats re-cut before it was put back in the Car.
Then in 1997, No 3 exhaust valve was found to be bent, the reciept mentions stripping the head, but also stripping the head off the spare engine to inspect, so it isn't clear if they put that head on or the original after reseating the Valve...
So I could have a Bent Valve in BOTH heads....
Thanks for the offer of the tester rick, I will let you know. I need to consult with my mechanicaly minded Father first.