mviker - I have a problem about like you describe and also would like to have a solution. And I like your pictures. Don't know where they came from but they seem to explain a lot. My 61 manual has about the same picture for the V8 but without the housing shown.
What I still don't understand is the comments about CW/CCW rotation. I have never seen a system where V belts run any pulley on the flat side of the belt. Always on the V side in a pulley groove. You never bend a V belt backwards over a pulley. And then as you think about it I have never seen a differential with the ring gear on the passenger side. Not that it can't be done but I have never seen it. Which means that every engine I can think of must rotate CW when viewed from the front of the car or the car would move backwards in the conventional forward gears.
So although the parts people list both CW and CCW pumps I think that they are failing to say if they are viewing from the front of the car or from the drivers seat.
And as to all the pump vane styles I suppose that different engineers may have different ideas about pump efficency with different vane styles. Although NAPA has a informational post with their online listing that they seem to think explains it.
But we still don't know for sure what parts number from which parts house gets a pump that will cool in traffic.
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