When I installed power steering into my 68, I used
this bracket, which I believe is very close to the original bracket that came in our trucks.
However, it appears your power steering pump pulley is located further forward away from the power steering pump itself. Mine is a double row pulley from a 75 C10 and not a single like it should be, so I believed the aft pulley groove was the correct one, and so used it. (ignore the slightly misaligned harmonic balancer)