Well, as much and as long that I have been hanging around 216-235-261's, I'm somewhat confused about this issue.
I've got a two belt balancer and a two belt water pump on the truck with a low water pump and have had to go to a flex fan with 1-1/8" of depth to clear the balancer with the fan. In the mean time, my fan is sitting about 3/8" away from the radiator, which I don't like. If I install a high water pump kit, I can pick up three inches in height, but the flex fan still barely misses the balancer unless I go to a 13" flex fan of some sort. If I do go to a 13" flex fan, is that enough air for a 261. If I go to a stock fan, the blades will have to be short or shortened to miss the balancer and for some reason the stock fan will end up pretty close to the radiator. Does this sound familiar to anyone else? Have you found another solution that is better than those above?