I pulled off the dragging pump and found the impeller was hitting on the flat , not the side. Like the impeller wasn't pressed down on the shaft far enough, except it only hit for less than half a turn, so it must have been out of true.
Anyway, exchanged the pump, and the new one works fine.
I was able to do the whole job from the top. I pulled the coolant tank, window washer tank, and disconected two coolant hoses and folded them out of the way. also pulled the A/C compressor out of the mounting brackets and set it out of the way, but left the brackets in place.
I almost couldn't get the three bolts off the water pump pulley, but then remembered the old trick of wedging a flat bar on the two other bolt heads to pull against. Also had to use 6 point sockets (the hex heads seem kinda sloppy) and just the right amount of extension to get to the pump bolts but still clear the chassis.
Larry