i recently ran into some overheating problems in my 1990 fsb with a 302. i instantly replaced the thermostat and the gasket and went a a 10 minuate drive to see if the problem was fixed. about 6 minuates in it started overheating. the check engine light then came on and white smoke was billowing from the engine bay. the smoke did not smell like coolant, there is no white smoke coming from the exhaust and there is no combination of coolant and oil in the crankcase. correct me if im wrong but i think one of those symptoms would show up if the headgasket blew. im thinking the water pump blew. if anyone has any insight please share.