W5 heads leaking water in cylinder

My W5 heads have one cylinder that is getting water in it I had them sealed up before I put them on and I keep sealer in it what is the best sealer to put in the radiator to keep it from leaking also I'm looking to run a set of the Edelbrock Victor heads I'm hearing they will make more horsepower than the W5 what's your opinion

More info needed on what is going on/what has been done.

Supposedly a common W5 issue from what I have read. Never owned a set though....

Repost this question in the race only section to reach a larger number of guys who might be able to help you.

You need to pressure test them and see where the leak is. I seen them leak from several places.

Everything is repairable. But just because you can doesn't mean you should.