Doing a manual to power steering conversion on the wife's 1971 R/T Challenger.
The car has a 440 Six Pack engine and I would like to get a steering pump that looks fairly close to original.

From what I understand it should be a Saginaw pump with the older style resevoir?

Would this be the correct pump minus the cooler?

I've seen quite a variety of prices on these, would the cheaper ones Rock Auto sell be the same as more $$$ ones the Mopar resto places sell?

Thanks.