power steering pump hose size

Ah so the really early ones use a HUGE return hose?

Yes and IIRC it's up through 66. I believe you can swap the 5/8th return hose nipple for the smaller 3/8th on the box if the pump is also changed. I might try that on my wagon as I'd like to try to use a PS cooler. I don't want to use the cooler for the larger line.