Guess I could get a Mildon, which has 8, and add a plate.
that is what I would do & get the pulley to spin it as fast as you can tho finding a pump pulley with the dia in your wanted range (~6") AND having the right depth for pulley/belt alignment ain't gonna be (too) easy.I would do the rest of the system: shroud/fan with many blades/fan spacing in the shroud/stiff lower hose or hose with a spring/proper timing/proper A/F ratio/good high flow stat, 180F or higher/good/clean 3 core radiator as wide a one as possible.
