<- not a fan of radius arms at all, seen my fair share of carnage due to overflexing radius arm suspension.
If it were a vehicle originally equip with radius arms and you were trying to work with that, then I say why not, but since you are pretty much starting from scratch, 3 link with pan hard or 4 link the front.
I've swapped full wideth axles into TJ's before, you will need to remove the axle's coil buckets and either fab or purachse new ones. you will need to incorporate a portion of the diff casting into the drivers side coil mount, so I suggest doing that side first, keeping the mount as close to the axle tube as possible then build the passengers side to match.
I am assuming you are thinking raduis arm since that is what the ford axle has. if you have welded mounts, just cut them off, if you have cast raduis arm mounts, life just got a little more difficumt, but you can work around them.