Looking for a set of 8 pistons for my 427 BBC, it is .040 and I am running closed chamber heads. My heads are ported and polished. Please let me know if anyone has any to get rid of before I purchase a set at an outrageous price, I am looking to save a buck.

I have a jetboat with a 427 w/ bassett wet headers, I replaced cam, hydrolic lifters, new timing chain belt. What I am getting at is when I run water through my motor without it running it begins to pee out #3 exhaust hole of the wet header of the drivers side? I did replaced the head gasket yesterday and put it all back together and the same thing is still happening?  Is it possible that the aluminum intake manifold has a crack? Please help me to get this figured out, I have ran it by my many motorhead friends and I am at a loss....

***Thanks everyone for the advice, I found the problem with all of your help***