Fan question

Neither of those will work with a clutch at ALL. The center holes are way too small. The clutch fan is a completely different beast. It has to have a center hole large enough to slip over the flange that bolts to the water pump. Usually about 2" or so. Also, if you're wantin to know which of those two will cool better, the one on the right. It's not a flex fan, so it will use more power, but it wil cool like a sumbee.