Where is the thermostat in 1980 el-camino?

In a 1980 El Camino, the thermostat is located in the engine's cooling system, specifically at the engine intake manifold where the upper radiator hose connects to the engine. To access it, you'll typically need to remove the upper radiator hose and the thermostat housing cover, which is usually held in place by bolts. The thermostat itself sits inside the housing and regulates the flow of coolant between the engine and radiator.