It would not be all that cost effective,the long side would have to be cut down about 4" or his springs would have to be outboarded.The unit bearings could be turned down and drilled to a 5 lug pattern but they have 130K on them and he would have to come up with a brake set up.If he is serious,I do have a ford axle that I could cut down and convert to 5 lug with the 4.10 gears for $1200 or less.Have him get a hold of me.