Can a radiator flow in either direction? The radiator in the F-150 donor truck I just bought is side mounted (the "tanks" are on the left and right, not the top and bottom.) I'd like to spin this rad 90 degrees (long direction will now be vertical instead of horizontal) and use it in my new project. However, the filler neck is on the same end of the rad as the bottom hose off the block. If I spin the rad so the filler neck is still at the top, then the hose that was connected to the bottom of the block will now be connecting to the top of the block. Anyone see any potential problems?