where is the thermostat located at on this beauty

Just follow the lower radiator hose, it's attached to the thermostat housing among with an other, smaller hose. Here is how to replace: 1. Disconnect the negative battery cable. 2. Drain the engine coolant. 3. Remove the plug hole plate. 4. Remove the drive belt. 5. Remove the P/S oil pump with hose and pipe still connected. Position the P/S oil pump out of the way. 6. Remove in the order indicated in the table. 7. Install in the reverse order of removal. 8. Refill the engine coolant. 9. Inspect for engine coolant leakage. Zee

How many miles do you have? The thermostat should be under warranty until 60,000 miles...food for thought.