Power Steering conversion kits.

No conversion kit that I know of, except for a DIY conversion kit. I built 2 conversion kits out of parts i pieced from everywhere for my 67 notchback, and my sons 69 notchback.

Manual to power you need to change the steering shaft and coupling in the column since the column shaft is shorter on power steering cars, and the coupling has smaller splines than the manual box. Slant 6 or V8 the same power steering shaft, coupling, and power steering box can be used.

The good news is theres lots of 67s out there that are column shift with power steering. You can use the shaft and coupling out of one of those in your column even if its floor shift. As far as the pulleys, and pump go, as long as the rest of your pulleys are from 67-69, you should be able to use a pump, and crank pulley from the same years.