DJ,
It's a bolt on providing you obtain the gear box bracket kit which is available from various suppliers. Use the gear box, hoses, pump & brackets, pulleys, and rag joint from the 70-72. It is also necessary to cut & weld the shaft in the steering 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