340-6pac Dyno

Well Moparlee,
It sounds like you have a very well ballanced combination of parts in your engine. I think you would be surprised if you dynoed it. I don't think your headers are too big, air in and air out makes horse power. You may loose a tad on the bottom end torque, but as light as your car is and swapping a stick on top of that, you could stand to loose a little. You should blow the street tires off. I think your car will FLY!!!