[Pontiac62]

I posted this on the heating and cooling forum, and got no responses. Maybe someone here can answer the question.

I pulled the water pump off my 62 GP to change the pulley. I'll address the pulley problem in another thread. The pump that I removed is shown in the first pic. It appears that the impeller blades are curved in the wrong direction. Rotation of the pump moves the convex side of the blade into the water. I have two other pumps that are also shown. The blades on these two are curved in the opposite direction as the blades on the first pump, but appear to be curved correctly.
Also, the blades on Pump 1 and Pump 3 are approximately 3/4" deep, the blades on Pump 2 are 1/2" deep.
Does anyone know which is the correct pump. The engine is a stock 62 389.

Thanks for your help,
Les