So you have breathers on both valve covers??


What head gaskets did you use??


Where is the PCV plumbed into the system??


To help try getting rings to seat you can lightly sprinkle BonAmi powder into the air horn on the carb while revving the motor --will help with the seating of the rings and valves-------


You said heads were off an old vet??????? any valve work? guides/seals?? drill steam holes??


Any sleeves in block??


What type intake manifold?? good seal at front and back cylinders next to water passage in heads/manifold?


Did you get it warm/hot enough to vaporize condensation from leaky combustion??


Any pressurasation of cooling system??