tuner

From my signature you can see what I have in my car right now, and with a mm motorsports suspension kit and a tf engine kit, what would be the best tuner for my car? and where can I buy that PMS tuner from? I know if you buy the tweecer from the website that is mainly all they sell so they are high in price. I dont really know much about tuners if someone can give me info. on how much they help foxbodies. my car was speed density right but I put in the mass air conversion so it is mass air. it has the stock computer; the replacement that came with the mass air kit. When should you change your computer and put a tuner in and how much performance do you gain from them?
 
You really don't need a turner at this point....if that is all you have done. Focus on heads, intake, and other various bolt ons right now. A turner wouldn't do much for a relatively stock motor. You want a turner when you have modified your engine to the point where the stock calibrations are not allowing your engine to tale full advantage of the modifications you have made.

Mod the thing first, then think about a tuner.