Another C20 Suspension Question

[Nima]

Hello All:

I am looking for ways to make my 67 C20 ride better while I am keeping my 8 lug wheels. For some reasons I like them 8 lugs! I have already converted to all around disc brakes and put on the 2005 8 lugs wheels from my 2005 2500 Duramax. I know this is a 67 3/4 ton trucks and I don't expect to get a modern sedan ride but I am looking for some improvements. These are what I am hoping to accomplish:

- Stock heights
- Level the front and back
- Improve the ride since this is not going to be a work truck anymore
- Keep my 8 lung wheels and disc breaks.

Is there any upgrades for springs and shocks (can I just use softer 1/2 ton ones)? I have never installed bags but would that help?

The truck has rear traction bar, coil springs, half leaf and shocks.

Thanks