I will agree bjuice if he don't then there is something wrong.
I sold both of my engines a couple of years ago and told them that i would pull the pan and intake if they wanted to i also offered to pull the heads but if they didn't buy it i wanted the money for new head gaskets and thought that was fair .
But both was sold and they are still happy today i see them all the time at the track .
Be honest and don't try to hide anything and everybody will be happy. i always say.