if you still have the stock electric fan for from your mustang, you can wire it up so it doesn't use a sensor to kick on but instead a switch, that alone can help cool the engine quite a bit... with radiators i'd say just order one from jegs or summit, any of the aluminums they sell will be plenty good..... if you go with any pullers or pushers, then you'll be plenty cool... just remember that if you get too sweet of a cooling setup... you'll regret it on a cold night