Help identify please: power or manual gearbox?

I just purchased a '74 Duster and I'm new to MOPAR vehicles. The car isn't too far from being road worthy, but I need to address a few things such first as steering (next will be brakes, clutch, seats, electrical).

Anyway, I can barely move the wheels at a dead stop so I needed to figure out what I had as far as steering is concerned. Can someone help me identify the steering gearbox in the attached photo?

If it's manual, then maybe I need to get me an original steering wheel for the one I have is too small of a diameter to put any leverage.

If it IS a power steering gearbox, then I guess I'll be needing a power steering pump. Can you guys point me out to what I need to get this thing working again? When I bought the car, I was told the car no longer as a 318 and it's now a 360.

Thanks!