6 bolt to 5 bolt swap

[tlman]

i am new to this posting stuff so be patient with me , in 1981 I built a 1967 gmc sb step side ,at that point I used a 72 as a donor ,it was in a pile in local scrap yard ,cars on top of it ,but any how all 5 bolt parts switched no problem ie spindles ,brakes ,ball joints and rear axles
I will post a pic of that ,but over the years I began a new one as my 1967 was totaled less than a year later ,but I still have the pieces
now my question is why doesn't any body know that you can install 1973 -87 parts on this ,I just installed the rear axles 31.5 into my 1970 from the 73 ,changed the ball joints to 73 and installed the spindles ,my 1973 was almost on its way to scrap ,I had it loaded on trailer and decided to keep for now
I searched for hrs because I believed the rumours that this wont swap ????
Like I said has nobody else tried this ? I did this in the 80s and it worked
Please give me some feed back on this