596 heads on -68 340

I bought a set of the same heads and had to strip one head down and have the exhaust side resurfaced it was rusted so bad it wasn't flat ,when I called them they said to have it resurfaced and they would pay for it, they didn't want to pay the whole bill ,they said 75$ was too much (I'm in the dc area where shops charge 100$ a hour) they would just pay 25$, and I had 300$worth of up grades to the heads . I though 75$ was a good price for stripping the head down and cutting it then cleaning it up and putting it back together again ,but they did run good without any problems