The canned tune from American Muscle does not max out the potential of your intake/engine. Doug from Bamachips will write you a custom tune specified for your car, which will give a better overall feel of the car.
If you are set on headers, just get the eBay headers, they have showed similar gains to the more expensive BBK ones.
I say give the LSD and gear another shot with your father, you won't regret it.
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