My .02
Keep the Black Magic, or maybe get a new one if it's defective, and get a nice aluminum radiator. You have a nicely modded, supercharded GT and that looks like the stock radiator, which is nowhere near efficient enough. I got one from Granatelli Motorsports that I love, with a Black Magic fan on it and my car runs ridiculously cool no matter what. Including idling for hours in traffic in the desert on the way to Vegas with the A/C on (stupid road work). Also looks nice under the hood.