cougar

Again hope it is cool to ask Cougar questions here since they are so close to stangs. But hey I just bought a 68 cougar from a guy. Runs and starts perfect but it over heats. I feel pressure building in the top hose so I thought thermostat. Changed that and the hose and I am still experiencing...

Sorry if this is ill placed or the wrong place to ask. But I am buying a 68 cougar and the gentleman is saying it came stock with a 351 cleveland. According to my knowledge and decoding the vin that was not a option. But not to say one was not put in there at some point, how can I identify the...