Which blower are you referring too? If your 4WD has A/C, the condensor is mounted horizontally between the front axle and front bumper. It has a louvered cover on the underside and two fans on the top. The 4WD radiator is smaller in height due to the space needed for the front differential. Presumably the condensor was relocated to allow the smaller radiator to cool more efficiently. The shroud on a 4WD has tabs on the bottom that locate into clips the same as the 2WD but the bolts on the top of the 4WD thread in vertically as opposed to horizontally for the 2WD. This is why the shroud on your 4wd appears to be attached to the engine cover with sheet metal screws.