3/4 ton to 1/2 ton suspension swap.

[desert-rat]

1969 GMC 3/4 with rear leafs.
I know this has been discussed like a trillion times. And it's mostly about compatibility. I understand that the frames are the same from what I've read mostly. So instead of doing compatibility fitment and the aftermarket being endless for these trucks. Here's what I'm thinking; just remove all the 3/4 ton suspension and steering, add aftermarket 1/2 ton suspension with rear coils with 1/2 ton axle and R&P steering and do a 5 lug setup. Unless somehow I just happen to find a 1/2 ton roller, frame, or someone selling entire 1/2 ton parts.
Can it be possible??
Thanks.