Power Steering conversion kits.

Steering column is not really a challenge at all. Providing you are using the original 67 only column that's in your car, just find a 67 parts column for power steering. Use the shaft and coupling out of it. All the 67 A body power steering internal shafts are the same weather its column shift automatic, column shift 3 on the tree, or floor shift. All the same shaft. Most common was 67 automatic on the tree w power steering. Grab one of those, pull and swap the shaft out, resell the parts column with manual shaft in it.

My sons 69 currently has a 69 floor shift column w manual steering. I have a 69 automatic on the column for power steering. Going to pull its shaft and swap it into the floor shift column. Easy peasy.