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need a bit more information to work with. i wouldn't say replace head gaskets with a concern of "overheating". have you checked, the thermostat, waterpump, coolant level, coolant in the oil, those kinds of things first
If you have a 3.1 V6 it most likely is the intake manufold gaskets. That is dependant on how severly you overheated the engine. Crashd is correct, not enough info. contact me at autoknowhow@gmail.com