Water pump rotation in a big block housing?

Anyone run into this?
The first picture is the housing on a motor home 440. (1975)
The second picture is the housing on a 383 (69 date code).
So I've learned that MOPAR did change the housings in the 70s and put the return on the passenger's side.
The third picture are the respective water pump impellers.
Now notice the new one from Advance.
The vanes are "backwards"???
Every big block car I do a search on at Advance comes up with this same water pump for a big block.
I'm thinking that the vanes may not make a difference since they don't seem to be canted. Just straight up and down.
I'm also thinking I'll swap housings and use the 69 housing which will keep the return on the driver's side.
Non-ac car
Opinions?


As as side note, the radiator is a 17X26 core.
I checked it and the bottom is leaking all over.
Wow, has anyone priced OEM type radiators?
Brass must be high.
And inflation, of course.
$287 is the lowest and it goes up to the 500 dollar range for a B body.

At least A body radiators are still seem resonable at the parts store.
I just bought a heater core for a Dart under 50 dollars.