Thread: Coolant in cylinders; fresh 400 sbc build

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I just walked back out to look at it after typing this post and #4 was full of water again after just sitting there for a few minutes. This means it is flowing there pretty fast. Turned it over and water pumped out of #4 only. This tells me it is likely a head gasket but I want to be sure before tearing it down again

more likely is a cracked cyl. block or head

lets say its a cracked head. I have a set of 305 heads sitting around. What would be the out come of 305 heads on a 400? The only upgrade is a 0.442 int./0.465 exh. cam.

Just foating some thoughts, but the question was is there a way to tell whats wrong before I take it apart? You know, like if you put oil in the cylinder you can determine bad rings or a valve.