I meant the stat in my previous post. And it's not actually the heater, but the defroster, which I'm guessing that runs through the same thing, so it still could be a heater core. However I was helping change balljoints on my buddies 95 F250 HD with the Sno-fighter package, and a 351 in it, and he told me that his truck runs at the same temp where my gauge is, which looking at a 92-96 dash cluster, where it says "Normal", the needle sits between the N and the O on the gauge.