Drag Strip tips and advice needed.

Well, If I did not have bad luck, I would not have any luck at all. At the test and tune last night I did get a couple runs in the 12s, 12.871 at 106 then disaster happens. We pulled into the pits with smoke/steam coming out the exhaust. Pure white smoke. That ended the night of course. Brand new engine (less than 500 miles) and now I have a blown head gasket or worse. The temperature shot up to 214 as well. Today I looked at the coolant and it is brown/greenish. I do not remember what kind of gasket at the moment or if this one was placed dry or with any gasket sealer, copper or ?
I am hoping that it is just a head gasket. What else should I look for or at?