My car5 is not exactly a Mustang but close enough. 351W .030" over, stock heads, iron water pump, no rear coolant crossover, 180 t-stat, tap water and a bottle of water wetter, 31 x 19 Griffin single row of 1" tube aluminum radiator, 20" electric Crown vic fan that only covers about half the radiator. Car stays at or below 195, unless im sitting idling for a while (about 10 minutes) or when im at WOT, but as soon as i let off the temp drops (might have something to do with some belt slip).
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