I did this to my car a few years ago, I kept meaning to post it in case it was useful for someone else someday. I'm sure there are cleaner and nicer ways to do it, but this what I did. I used a Mazda / Ford / Volvo electric power steering pump, I think mine came from a Mid or late 2000's Volvo. Some of them have a remote reservoir that if someone was feeling ambitious they could poke that up through the fender or just bring the pump up higher and poke through. I fabbed an aluminum bracket that ties into the bumper mount bolts and part of the inner valiance? panel behind the headlights. I purchased a Volvo OEM wiring harness for the pump power, but if you can get with the pigtail from the yard it would be way better. Also I found someone on ebay who sells the connectors and crimps as well I think for $20. I believe if you know the right parts you could also get from digikey. You need 3 wires, constant power, ground, and switched ignition to turn it on. If one was so inclined they could hook up the CAN bus to it to change it's speed but that would take real effort, without the CAN bus it goes to a "default" or "limp" mode and it will happily sit there and work. I have the engine out of the car at the moment for an "upgrade" but you get the idea, there is a lot more room. The car had a 69 318 in it w/ schumacher mounts on a /6 K member. I had tried to install a factory pump in a few different bracket setups and pump styles but none of them work well / cleared everything so I went this rout instead.