8 Lug Hubs to 6 Lug Hubs??

[StylEmon]

Hey all, this may be my first post, although I'm a long time lurker. Lots of good info on this site, but I'm having trouble tracking down a situation like mine.

I'm looking at doing a disc brake conversion on a 66 GMC RWD with a 3/4 ton suspension and 8 lug hubs. Can I swap the hub with a 5 or 6 lug hub? Or do i need to swap the entire axles/suspension?

Are there are 8 lug disc brake conversions? Where would i find the them along with the 3/4 ton drop spindles?

I'd prefer not to put an adapter in there and would like to just do this all with the disc brake conversion.

Thanks