I mocked up the Radiator, 17" Rigid Fan and 1/2" Spacer today. As you can see there is plenty of room from the front of the Fan to the Radiator. Just over an inch. The spacer is needed to clear the accessory pulleys. I could even install a 1" spacer if needed to go farther into Shroud.
Tom's Bronco Parts Aluminum 5.0L Conversion Radiator
17" Rigid Fan - Don't know cfm but it's a TON.
1/2" Spacer
96 E-Series Water Pump and Accessory Brackets (Saginaw Pump)
Pulled 351W from a 96 E-Series Van. I installed the front dress for the van too. (F-series is the same) All Ford Parts and fits like it was designed for the Bronco, with only MINOR trimming of the stock, original fan shroud.
The Problem that a lot of people seem to have is trying to make everything fit with an extra thick Aluminum Radiator. Then there is NO room to mount a decent fan to get any air to move through it.
This combo pictured works GREAT, even here in HOT, HUMID FL. Same combo with Stock Radiator works well too.