This is the most popular question with the most popular answer. Mike or Jeremy. There are a few fbody shops in Orlando. Next Level Performance (my loyalty sits here) There's also Vinci, Corvette Masters, American Motorsports, even Lamotta can do a good job with your car, as far as an actual tune though Mike Norris is unquestionably the man in Orlando.
I'd just go ahead and get Mike Norris to do it. I'm partial to Jeremy, but Mike Norris does a good job and is just right around the corner. Whereas Jeremy lives in Tampa and makes trips every now and then to Orlando, and other places. If you can wait have Jeremy Formato do the tuning. If you need it done now, just get Mike Norris to do it. They are both good tuners.
I'd go with either Tim or contact Ryan (slow is his username on the board). I think they're both more than capable and both will work out a very competent tune for your car both drivability wise and powerwise. What good is a car that makes power if it doesn't idle or drive worth a **** IMO.