Larry, is the steering box a stock ratio box? And is the flow control valve in the pump the correct (low pressure) one for the box? I changed my 66 to a quick ratio box and with the required high pressure control valve in my pump I get a chirping squeal when the box hits the locks at full travel. I put the low pressure valve back in as a test just to see what would happen and could hold the wheel on the lock at full travel with no squeal. This is normal for the high pressure so I learned to live with the noise on those occasions where I need to make tight turns.
Todd.
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