I usually can figure stuff out, but this is driving me. Fresh SBC motor, good head gaskets, fresh cylinder heads, no rockers, pushrods or headers installed. Known good intake, new gaskets. I decide to fill the cooling system to check for leaks, so far so good. Start to move on to finish installing the remaining valve train, Etc. this is where it gets good...water is coming out of some exhaust ports, not just a little either, pools inside on top of valves. Shit, this is coming apart now; pull intake-same story in the intake ports. this is on both heads. I can see nothing where the water came from, I know I need to yank the heads, I'm not whining or looking for a miracle, just like some ideas on what to look for???