Join Date: Jan 2019
Location: Sedgwick, Kansas
If you have serpentine belts, you MUST have a reverse rotation pump. Since you already have your radiator, and don't want to change it out presumably, get a pump that has the water outlet on the correct side for your radiator's lower connector. (top, as far as I know, is *always* passenger side) Using a long hose that passes under the front of the car to get to the other side can present problems with fan and pulley clearance, as well as collapsing when you rev the engine.
If you decide to get a different pulley and bracket set, make sure it's really a set. Trying to deal with all the individual pieces, and matching different years from different vehicles can present a serious challenge.
I have no idea what you mean when you say 6-spline pulleys. I mean, I know what splines are, and how they work with pulleys, but I've never seen splined pulleys used except on superchargers, so you kind of lost me here. I'm thinking that if there's a set of 6-spline pulleys to be had, you'd need a lot of other oddball supporting gear to work with it. Extra cost for no good reason, when there are so many good factory sets and aftermarket to be had.
"No matter what you are, be the best one you can." -Abraham Lincoln