Here is a good read for you. I did this swap. It’s great. It is simple to do and makes the truck drivable. The hard part is finding the donor... it took me a couple years of looking. Mind you I wasn’t looking really hard. The funny thing is I found the donor 4 miles from my house and got there while 1972 C20 truck for $500. I could likely sell it for $1500-2000!

https://www.stovebolt.com/techtips/axles/1%20Ton%20Upgrade/



1970 Chevrolet C10
Grandpa's -- My first truck -- In progress to shiny
Follow the build in the Project Journal
1950 Chevrolet 1-Ton Dually
"Ole Red Girl"
In the Stovebolt Gallery
More pictures here
1951 GMC 9430 1 ton dually--Shiny! | 1972 Chevrolet C20- Rusty- the puzzle box lid for the C10 | 1962 AMC Rambler American- my wife's
Parts trucks-
1951 GMC 9300 | 1951-GMC 9430 | 1951- Chevrolet 1300