Massive coolant leak issue

[D. Hammack]

Have a 2000 RR 4.0. Two days ago it overheated while driving. I shut it down ASAP and let it cool. Coolant level was low, so new was put in. Drove home with no problems. Next morning, however, massive amounts of coolant covered the garage floor. There appears to be a leak, but I can't find it. It's dripping down to the oil pan. I'm hoping that I didn't do some major damage. Coolant doesn't leak when engine is off and cold. Run it for two minutes, however, and the drip starts again. Any ideas?

[Sailcnc]

you warped the head and the head gasket is leaking. I had mine done two years ago. I am not sure if it was dome incorrectly or the gasket failed. I am in the process of re doing it now. The engine is completly apart and I will take the heads in to have them checked out. It was 2k last time I had it done. I do not want to put out that cash if I do not have to.