How do you turn a 2wd 87 Comanche into a 4x4?

You will need to replace the entire undercarriage, transmission, put in a transmission with a transfer case, different rear drive shaft, different ratio rear differential, install a front differential and suspension and install new shift linkage and a 4WD shifter. What you're proposing will be far more expensive than the worth of the vehicle. 87manchee------ I did it if you have, find an old cherokke someone does not want(or like 200.00) 4x4 you will figure it out from there. Really not worth it inless you were givin a free manche