Short Pump vs Long Pump (Again!)

[Stepsides 4Ever]

I've pretty much decided to go for the long water pump conversion due to the fact that there is a lot more later model stuff in our local boneyards than earlier stuff. I've got the truck front end stripped down to the frame so it will be kinda hard to take measurements, but if any of the members have done the conversion on a 350 SBC/4-row radiator, how is the fan/radiator clearance with the 1 3/8" longer water pump? Is there enough room to use a clutch fan, or even an electric puller fan? Pictures would be a great help!

As always, thanks for your help!