ford-trucks.com has a nice forum with good information.
What you will need to do when you choose an appropriate front axle is get rid of all the ifs mounts and weld on brackets to accept control arms, coil buckets, and shock mounts for the solid axle. I imagine there would be quite a bit of custom work.
Go to those forums and ask around. Good luck!
06TJ Silver Ruby - REBB w/DT3000s, Quick Discos, Superwinch EPi9.0, Warn engine skid, PS Box Skid, Diff Guards, IPF Lenses, x51s soon
92YJ White - Slight Shackle Lift w/30x9.5 BFG ATs, Custom Beefy Bumpers
06TJ Khaki Sport - Traded in