Pulled mine off this AM. Did not remove radiator. Did not remove air pump. Did not remove alternator. You do have to loosen the alternator bracket where it bolts to alternator and obviously the 2 bolts/ nuts that hold both the alternator bracket and the water pump. I loosened both the clamps on that hose that runs to the bottom tube, as well as both bolts that clamp that tube in place, it came right off. But beware, the block will then puke its guts out on you. Like jinx say the worst is the hose that runs from the WP outlet to the tube then another section of hose to the bottom of the radiator. I could not get at the clamp at the outlet. I had 2 of the long studs for the WP still in the block. No way the WP can come off with the PS and AC (in particular the AC idler pulley) in place.......unless as I finally realized...you remove the studs using the double nut method. Once they are gone the pump can be moved and rotated and the rubber hose crushed to clear the AC idler pulley and bracket. The install will be later this week. Getting all new hoses and clamps....not wanting to go back in there anytime soon.