I second that, Harry at Ztuner is awesome, very knowledgeable and can do anything. However he is just one man, last time I was there, he had 7 Z's to work on, by himself. So you may need to call/email him to get on some sort of a waiting list (totally worth it). Fever Racing (Z Fever) is also in Tampa, but I've heard so many negative things from there. I personally never been there.