The value job is 20 years old, Mike lapped them and installed new seals. He said the intakes are stock 340 Chrysler and the exhaust valves are some kind of after market.
The heads flowed 241@500 when I brought them to Mike, when the Dyno runs ended and I was a bit puzzled with the big numbers he admitted that he touched them up a bit more one night when he was bored!