Rebuild needed for 3/4 and 1 ton trucks?

[Canada20]

Hey all. From what I've read, all the talk of rebuilding suspesions for 67-72 trucks seems to apply to C10/K10s. I haven't noticed any topics about rebuilding on C20s and C30s. Is that because they use metal bushings and don't wear/rot the same as rubber or is it just that I've missed discussions about that?

I'm finally going to try and rip into my old beast this weekend and part of my long term plans include a disk-brake-crossmember swap from a '72 Longhorn that I dragged home in the back of my Honda. I figure if it WILL need rebuilt, the time is now, while it's not in my truck.

Many thanks,

Greg