i GUARANTEE that you would make more power if you had your car tuned on a dyno. even if the tuner knows all your mods, its not perfectly calibrated for your car. with older cars this works fine, but these 197s are soo sensitive. each one is different.
Fred At Evolution makes a wicked tune, and will do what he needs to make things right. He sold me a JLT and SCT tuner with three tunes for my mods..
It makes a real difference, and he backs up his sale..(610) 485-3596
He sells on ebay too, but I ordered on the phone.. Got setup for $500.
Also, I had a really bad electricall issue with my car where it thought it was 'on' even when the key was out of the ignition (all gages and displays were on while car would not start or turn off)
Ford re-flashed my PMC with a new tune and PCM code, Fred updated my tuner with the new PCM data for free.. nice to have service after the sale.