['68OrangeSunshine]

Yeah, I have the stock manual Saginaw box on my '68 C/10 Stepside. I love it. No drips. No squeels. No freaky hoses to find rotted out and be a b!itch to change. No having to bleed same. And it turns on a dime.
Set up is an L6 292, SM 465 tranny, shortwheel base, one-piece propshaft. [Original configuration.]
Steering box was NOS from Ed at Mothertruckers' a couple of years ago. Tires are new Dunlap 235/85R16LTs. [Tall and skinny]. L6s are a couple hundred pounds lighter in the nose than V8s -- and that helps. Stops OK on drum brakes too.
I tried converting from manual steering to power on my '67 K/10 Suburban [w/454]. It was a disaster. Bad turning radius. Bump steer. Broken bolts. Fluid leaks. I had to change back to manual, but it was not as good as before. '67 was a wierd year. They used ram-assisted manual steering. Swapping in a '69 power steering gearbox was not wise. My solution will be to convert to a '77 vintage Dana 44 with disc brakes and power steering. But that truck's just a pipe dream project for now.
My other runner is a '71 Jimmy. I was lucky this summer -- I had P/S problems, but it turned out to be the hi-pressure hose. I R&R'ed both hoses and flushed the box repeatedly until it bled clear -- and it was good. It also handled a lot better once I junked the PO's pimp Grant wheel [12"] and replaced the stock 17" wheel .