I was reading a 5.0 magazine and someone used an EEC tuner to tune his 95 5.0, said he went from a 13.2 @105mph to a 12.96 @106mph and got rid of the idle surge and such. I was wondering how well they worked, and is it pretty easy to tune your car with it, or should I just take it to a shop to get it dyno tuned? The guy in the magazine has a similar setup to mine so I was interested...MAF, TB, Intake, Heads, exhaust, etc...