Just sitting in the truck with the steering motor and steering wheel I can turn it easily enough. There's a bit of resistance but nowhere near as much as an unpowered power steering box.
I'm pretty sure the steering ratio on the Interpid rack is so high that it won't be any fun to drive without power assist.
All my A body Mopars had manual brakes and I loved the feel and being able to modulate the braking myself. Wouldn't want manual brakes on anything with drum all the way around though. Those are plenty scary on their own during panic stops.
The only manual brake car (only car I know for sure had manual brakes anyway) that I've driven is a '57 TR3, which had discs in front. Let's just say I didn't get to drive it spiritedly, it was a fresh restore and not mine lol.
I see 4 wheel drum Mustangs at car shows all of the time, never got to drive one though. Seems like that crowd likes to keep stuff more original than most of the classic Camaros I see.
You know the old saying 'If all you have is a hammer, every job looks like a nail"?
Well there's a flip side to that. If you have a fully equipped machine shop every job will require a lathe, a mill, bandsaw, drill press, welder, grinder, press, etc AND a hammer of course.