[YOI]

I recently purchased a Superformance Cobra #521, it is powered by a Motorsport 460 with a Demon Carb. As of today, the car has 681 miles on it. When the car gets up in temperature, I have noticed to my alarm, that when I depress the clutch to shift, the RPM lingers and then climbs on its own. I am forced to put my foot under the accelerator and pull it back to correct the problem. Has anyone had any similar experiences? Does this sound like a throttle linkage problem or a fast idle cam? I am scheduled to take the car in to a Ford dealership next week. I am hoping to get some advice to take with me. Thank you.