Just wondering if you fellas had any ideas. The truck runs well below the 210 mark with the AC off. However, when the A/C is on during stop n go traffic, it shoots way past the 210 mark. Nothing in the red zone but still too hot to me. When crusing down the freeway with the A/C on, it stays below the 210 mark as well. Just happens when I come to a stop in traffic for too long. Truck stays at 210 or below in stop n go traffic with the A/C off. Is this normal and just part of the stop n go b.s. What the hell makes the truck get so hot just because the A/C is on. Does the A/C put that much of a strain on a 350? As a side note, about how much hp do you lose with the A/C on?