I recently bought this 1964 300k with the 413. It had a REALLY bad power steering leak and was missing the resivore cap. Now I'm on my third "rebuild kit" for this exact application, the first 2 kits had o-rings that were far too big in diameter. But anyway a few questions. Btw i believe this pump is a Thompson style. -how do I install this pulley back on? As you can see the shaft is plain-end with no threaded port for an installer tool. -or would it be better swapping over to a Saginaw (I can actually find those fairly easy) Any help would be TREMENDOUS!