Thermostat location and illistrations?

If you intend to keep the car it might pay to invest in a service manual, a great source for pics. Most cars have thermostats near top of engine as any sludge usually deposits on the bottom. The top radiator hose connects the radiator to the t-stat housing a rounded bubble like structure held in place with 2 bolts. Before you remove it make sure you have a new gasket/s and some gasket cement. Once out inspect for dirt/ deposits. If you find a lot of slimy deposits ( not uncommon ) you'd be well advised to clean out the whole system including radiator. Take the car to a radiator place and they will flush the engine and radiator ( not an expensive job ). That done ensure your ignition timing is correct and that should ensure trouble free motoring.