Rodnhouston,
As someone who spent an inordinate amount of time trying to figure out how to cool a Subi turbo engine in one of our replicas, I suggest that you follow up with Carey at SE. They are the resident experts on radiator shape, type, and placement, along with fans and shrouds. Doing it on your own is a real PITA. Best of luck and please keep the group informed on your progress.