Axle swap questions

[Outbackfarmer]

I have a 68 K10 with drums and poor turning radius. First order of business is to get this monster to stop. Looks like the easiest way to do this is to swap axles and get disc brakes and improved turning radius. I need to know what axles will simple bolt in. I know I may have to worry about gear ratios. I have not checked to see what ratio is in the K10 now. I am having some transmission work done, and will be a week or so before I can check.
I have read several threads, but the more I read the more confused I become. Most say it is a simple bolt in, then some say modify the shock brackets, then some are modify the spring brackets, or both. What I would like to do is by a suburban and use the front axle out of it then turn the cabin into an enclosed trailer. What year suburban axle would work best? Some show 71-87 others say 71-91. Just need a little guidance on this.