eliminating carrier bearing in 76'

[rapidride3]

I have a 76' cheyenne longbed fleetside with a turbo 350 trans and a 12 bolt rearend. I want to eventually add a 700 r-4 from bowtie overdrives. I want to eliminate the 2-piece d-shaft and carrier bearing. I had an 83'gmc with a 700 r-4 and 10 bolt with a 1 piece shaft. I really liked the simplicity of the 1 piece shaft in my 83'. can this be done once i put the 700 r-4 in my 76????with the 12 bolt???