I'm looking at going to an electric fan on my '01 Silverado. I've been shopping around and have noticed two different systems; one where the fan unit has a built in shroud that covers the entire radiator and another kit the uses two 14" fans with round shrouds.

The second system ends up leaving some of the radiator uncovered by the fan shroud so the system doesn't pull air evenly through the entire radiator. Is this bad?