The cheap auto parts inline pumps push plenty for the power of our rigs. I haven't run them on a rover, but plenty of work trucks over the years and even a fairly hot 69 camaro with no problems. On the other side, I think I will go factory again when mine blows. Its not that hard to get to. I might use the alternative if I am somewhere and need a quick fix.
I love little baby ducks, old pick-up trucks, slow-moving trains, and rain
I love little country streams, sleep without dreams, sunday school in may,
And I love you too