If your car is getting hot, you should be looking into better cooling options, such as a large oil cooler, or perhaps an upgraded radiator if you're seeing high water temps.
STILLEN : STILLEN Oil Cooler Kit
With your setup, the ECU should be adequately able to control your A/F ratio. Tuning will always help with maximum HP and dial in your A/F, but you're not pushing it as if you're running a cold air intake, cat-back exhaust, HFCs or TPs and headers..