How hard would it be to convert a 2WD Chevy Blazer into a 4x4?

your looken at oround 4 thousand to do so, your better off trading your blazer off and getting a 4 wheel drive.

ALL u would have 2 do is buy a Transmission or extension housing A intermediate housing A Transfer Case A shifter assembly A complete Front Axle & front drive shaft A New or have another rear drive shaft made.a Vaccume switch & assembly if a NEW axle is used.New springs & mounts 4 the Front axle.OR buy one already 4 wheel drive.:->