This weekend I noticed that the power steering pump on my 73 vert (351C-4V) was making a "squawling" noise above 3000 rpm. I disconnected the belts to the other accessories so I know that the PS pump is the problem. It sounds just like a bad bearing. I looked at the shop manual and it does not look like you can just replace a bearing (like on an alternator). It's the original pump and it pumps just fine and does not leak and I've already detailed it. What are my options for rebuilding the pump? Can it be rebuilt, or should I just buy another one and use the pulley and housing off of this one?