Gatormike-
I have a 57 and installed the power steering kit from Chevy Duty. I found a pump, hoses and steering box from a 76 all together at a junk yard. I found their instructions to be OK, and all the measurements were as expected. It works well around the yard, but handling at highway speeds is yet untested. I don't have the tire rubbing on the steering box, but the clearance is measured with a feeler gauge, not a tape measure.
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