3 speed in floor back to column

[70shortstep]

I am new to the site. I fell in love with these trucks when I was 14, I am 42 now. I have recently bought a 70 stepside. I want to keep it as original as possible. Just a plain 3 speed, 6 cylinder. Someone has put the shifter in the floor. I want to put it back on the column. I have read a lot of threads and have not heard of anyone doing this. I would appreciate any feedback on how to do this and where to find the parts. Thanks for your help.