The unit that CPP has that resembles the factory set up is way too expensive and in my experience does not give a good feel of the road.
The classic parts kit uses a late Saganaw self contained PS box.
I prefer the Toyota conversion. It is also sold by various suppliers.
All of them require modifications to various steering components. The Toyota and the Saganaw also require mods to the column.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine