A body big block power steering gearbox

I agree with Murry on the pumps The 67 383 Barracuda and Darts did not have the power steering as an option. The power steering option on these cars did not start until 68. The 67 Big Block A body drivers side manifold is a 1 year only, 68/69 had a dimple cast in for the power steering option. I have not tried power steering install on a 67 car with the 67 only manifold so I have no idea if the dimple is actually needed or just a safety clearance? I have a picture of a 69 A body 440 drivers side manifold and the dimple is visible on the manifold at the #3 exhaust port. 67 manifold will not have this dimple.

69 Cuda 440 Drivers side exhaust Man 2.jpg