68Runner

I recently bought a 1968 Road Runner. It's the basic 383, 4 speed, with manual steering and brakes. The steering seems way more difficult than I found it in my youth so I'd like to upgrade to a power steering box. Just wondering what other experienced Road Runner owners have used. I see Borgeson has a nice looking box that's a 14.1 unit. I'd prefer a 12.1 box, but here I'm just comparing it to what I have in some other cars. I'm looking forward to your input and advice.

Ray