Using stock IC tubes out to the stock IC then couplers and bends to mount this in front of the radiator with a pusher fan on the front?
Maybe move the radiator and do some sealing to direct flow?
Here's one that will not block off much of the radiator, so with some creative air flow direction and sealing along with a good fan it could be made to move air quite well? But is it big enough to cool ALOT more than a stock IC?
What about one of these?
One of these with 2.5" in/out instead of 3"