Won a Giveaway

So recently I got lucky enough to win a giveaway from hemmings, but I need help to figure out what to do with some of the gift certificates. The one I need the most help with is a 500$ Flex-a-lite gift certificate that cant be transferred.
I'm planning to get a cold case radiator (66-74 A,B,C,E Body 17x26 Manual Aluminum Performance Radiator | Cold Case Aluminum Performance Radiators) with electric fans when I finish my 5.9 magnum and can afford to do so, but I was wondering if anyone had any recommendations for flexalite fans or products I could use with the radiator since they do not have any offering for Mopar vehicles.
I also won a gift card from a company called MPT industries which sells heavy duty oil with a lot of additives but I have never heard from them and their oils are not certified. if anyone has ever used their products or has any information on them id appreciate it.
Thanks in Advance