Power suddenly dies at throttle...

I drove around today for about an hour. Its about 85 degrees here in Hot-lanta, and very very humid. After about an hour of driving, i stomped on the throttle, and got an unexpected result.

I still dont have a tach yet. When i stomped on it, i got a surge of torque and it pulled hard for about a thousand rpms, and then around 3k, the power just completely died. It was like i just completely let go of the throttle. It was pretty much an instantaneous loss of horsepower. I was pretty stunned, so about 1 minute later i tried it again, and it was fine all the way through the rpms. It pulled really hard. About 20 minutes later of casual driving, i stomped on it again, and got the same results as the first time. I got about a second of acceleration, then it instantaneously died off. And again, i came to the next light, gunned it from a stand still, and it was fine.

Since its pretty hot and humid outside, is that the cause of the random power loss? The temp gauge was reading really cool, but it is possible that when i was flooring it a few times, that it was sucking in really hot air and power was just dying? I have a hood scoop and a hole in the hood, so it is bringing cool air into the back of the engine bay.

Any suggestions?

Is that what it is?

It is routed kind through the front wheel well to stay away from the headers, makes a 90 angle with the right side of the engine bay where it pokes through, 45 degree angle up to the distributor area, and then a right hand turn over to the left side of the carb.

Is this a serious problem? Or should i just get used to it?

Its a metal line up till it reaches the carb. Should i wrap this in some kind of insulation?