Fan clearance

I would absolutely find a shorter spacer. You probably can't eliminate the spacer entirely because you'll end up too close to the belts and pulleys without one, but even another 1/4" would make a BIG difference.

The engine and transmission are rubber mounted, they do move around a little and a 1/4" isn't much clearance. Under normal conditions it probably won't hit, but an emergency hard stop, big pothole, engine mount that lets go, etc could all spell disaster for your radiator.