Welcome Jbm. I prefer the Toyota conversion, it is efficient and smaller than the Saganaw unit. However, the boxes are becoming scarce and priced accordingly. Any PS conversion will require modifications to the column and related steering components.
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