Thanks guys, good feed back! I have to agree with all of your experiences. Right out of the box the old combo was stronger. The 60ft and 1/8 mile was quicker with the smaller cam and carbs. The mph picked up by 1 mph but the ET was down by half a tenth when I switched to the bigger stuff. Also killed the 2 foot wheelies! I am seriously considering going back to a good set of 4150 carbs to pick up the bottom end. I am afraid because to car ran so well with the smaller stuff on the first setup I got carried away with the bigger is better thing and went backwards instead. I believe because my car is heavy, that it is more important to get as much as you can out of the hole. The new setup may be making a little more horse power, however any gains that you made at the top were lost on the bottom. I would have to believe that the same would be true with the larger tube headers.