Check your Borgeson rag joint!
To owners of 64 - 66 with Borgeson power steering conversion, go check that the "safety" pins in the rag joint extend far enough to make contact with the metal shell in case the rubber biscuit fails. Although I thought I had followed the directions during the installation when the rag joint failed (after maybe 500 miles), the pins barely, barely made contact allowing me to steer the car. I believe either the pins should be longer, or the joint has too much built in "spring", and the joint has to be forced together before tightening the set screws on the shaft splines. Anyone else have this problem? Either way, go check and make certain yours is assembled correctly in order to avoid disaster.