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Steve,
1. Follow Doug's advice - you paid a lot of money for your Roush - it should run properly, especially since there's a known problem with the tip-in hesitation at around 2K RPM.
2. Tuning carbs and ignition systems are an art. I gather from your post that you don't have much experience in this area. My advice is (after you exhaust #1 above) to take your car to a dyno and have an expert dial it in for you. This will be cheaper, quicker and most satisfying than trying to fix it (ie: screw it up further) yourself. This will only take a few hours, and then it will be done right and you will not have to mess with it again.
Good luck. Keep up posted.
Regards,
Randy...
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